Cat litter
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A litter box, also known as a sandbox, cat box, litter tray, cat pan, potty, pot or litter pan, is an indoor
feces Feces ( or faeces), known colloquially and in slang as poo and poop, are the solid or semi-solid remains of food that was not digested in the small intestine, and has been broken down by bacteria in the large intestine. Feces contain a rela ...
and
urine Urine is a liquid by-product of metabolism in humans and in many other animals. Urine flows from the kidneys through the ureters to the urinary bladder. Urination results in urine being excreted from the body through the urethra. Cellul ...
collection box for
cat The cat (''Felis catus'') is a domestic species of small carnivorous mammal. It is the only domesticated species in the family Felidae and is commonly referred to as the domestic cat or house cat to distinguish it from the wild members of ...
s, as well as
rabbits Rabbits, also known as bunnies or bunny rabbits, are small mammals in the family Leporidae (which also contains the hares) of the order Lagomorpha (which also contains the pikas). ''Oryctolagus cuniculus'' includes the European rabbit sp ...
,
ferret The ferret (''Mustela furo'') is a small, domesticated species belonging to the family Mustelidae. The ferret is most likely a domesticated form of the wild European polecat (''Mustela putorius''), evidenced by their interfertility. Other mus ...
s,
miniature pig Miniature Pigs, also called mini pig, or Pygmy pig, are small breeds of domestic pig, such as the Vietnamese Pot-Bellied pig, Göttingen minipig, Juliana pig, Choctaw hog, or Kunekune (and specimens derived by crossbreeding these breeds). Min ...
s, small dogs, and other
pet A pet, or companion animal, is an animal kept primarily for a person's company or entertainment rather than as a working animal, livestock, or a laboratory animal. Popular pets are often considered to have attractive appearances, intelligence ...
s that instinctively or through
training Training is teaching, or developing in oneself or others, any skills and knowledge or fitness that relate to specific useful competencies. Training has specific goals of improving one's capability, capacity, productivity and performance. I ...
will make use of such a repository. They are provided for pets that are permitted free roam of a home but who cannot or do not always go outside to excrete their
metabolic waste Metabolic wastes or excrements are substances left over from metabolic processes (such as cellular respiration) which cannot be used by the organism (they are surplus or toxic), and must therefore be excreted. This includes nitrogen compounds, ...
. In the wild, cats naturally excrete in soft or sandy soil for easy burial. They use their paws in a backward sweeping motion to cover their feces. To stimulate this instinctive desire, a litter box's bottom is typically filled with or less of cat litter. Litter box filler is a loose, granular material that absorbs moisture and odors such as
ammonia Ammonia is an inorganic compound of nitrogen and hydrogen with the formula . A stable binary hydride, and the simplest pnictogen hydride, ammonia is a colourless gas with a distinct pungent smell. Biologically, it is a common nitrogenous ...
. Some litter brands contain baking soda to absorb such odors, or owners may sprinkle a thin layer in the bottom of the box, under the cat litter. The litter material also satisfies a cat's instinctive desire to hide their scent by allowing them to bury their waste. The most common material is clay, although recycled paper "pellets" and silica-based "crystal" variants are also used. Sometimes, when an owner wishes to stimulate the cat's natural instincts, natural dirt is used. The litter can give off a strong odor, and must be disposed of periodically. It is recommended that the litter box be kept in low traffic areas of the home, such as a basement or laundry room to avoid litter box aversion. There are commercially available special types of litter to help cover or lessen the odor produced. They contain baking soda, plant extracts and/or odorized crystals. If kept in a room with an intake vent, an air freshener may be added on the furnace filter to isolate the odor from the rest of the house.


Types of litter box filler

In the US, cat litter is a $2 billion industry consuming of mined clay annually.


Non-clumping conventional litter

The first commercially available cat litter in the United States was ''Kitty Litter'', available in 1947 and marketed by Ed Lowe. This was the first large-scale use of
clay Clay is a type of fine-grained natural soil material containing clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin, Al2 Si2 O5( OH)4). Clays develop plasticity when wet, due to a molecular film of water surrounding the clay pa ...
(in the form of
Fuller's earth Fuller's earth is any clay material that has the capability to decolorize oil or other liquids without the use of harsh chemical treatment. Fuller's earth typically consists of palygorskite (attapulgite) or bentonite. Modern uses of fuller's ea ...
) in litter boxes; previously
sand Sand is a granular material composed of finely divided mineral particles. Sand has various compositions but is defined by its grain size. Sand grains are smaller than gravel and coarser than silt. Sand can also refer to a textural class ...
was used. Clay litter is much more absorbent than sand and is manufactured into large grains or clumps of clay, making it less likely to be tracked from the litter box. The brand name ''Kitty Litter'' has become a
genericized trademark A generic trademark, also known as a genericized trademark or proprietary eponym, is a trademark or brand name that, because of its popularity or significance, has become the generic term for, or synonymous with, a general class of products ...
, used by many to denote any type of cat litter. Today, cat litter can be obtained at a variety of retail stores. Non-clumping cat litter is often made of
zeolite Zeolites are microporous, crystalline aluminosilicate materials commonly used as commercial adsorbents and catalysts. They mainly consist of silicon, aluminium, oxygen, and have the general formula ・y where is either a metal ion or H+. These p ...
, diatomite and sepiolite.


Clumping litter

Litter clumps were first developed by using calcium bentonite clay. This was manufactured in the UK in the 1950s by the Fuller's Earth Union (FEU), which later became a part of Laporte Industries Ltd. Subsequently in America, clumping bentonite was developed in 1984 by biochemist Thomas Nelson. Most are made from granulated
bentonite clay Bentonite () is an absorbent swelling clay consisting mostly of montmorillonite (a type of smectite) which can either be Na-montmorillonite or Ca-montmorillonite. Na-montmorillonite has a considerably greater swelling capacity than Ca-mon ...
, which clumps together when wet and forms a solid mass separate from the other litter in the box. This solid clumped material can be scooped out and disposed of without changing the entire contents of the litter box. Clumping litter usually also contains
quartz Quartz is a hard, crystalline mineral composed of silica ( silicon dioxide). The atoms are linked in a continuous framework of SiO4 silicon-oxygen tetrahedra, with each oxygen being shared between two tetrahedra, giving an overall chemical f ...
or
diatomaceous earth Diatomaceous earth (), diatomite (), or kieselgur/kieselguhr is a naturally occurring, soft, siliceous sedimentary rock that can be crumbled into a fine white to off-white powder. It has a particle size ranging from more than 3 μm to l ...
(sometimes called diatomaceous silica, which causes it to be mistakenly confused with silica gel litter). Because of the clumping effect, the manufacturers usually instruct not to flush clumping litters down the toilet, because it could clog it. Clumping clay cat litters are natural products. Some may also contain naturally occurring crystalline silica, or silica dust, which in California is treated as a known carcinogen under Proposition 65. Clay litter is also criticized by the manufacturers of non-clay litter because the components of clay litter are commonly obtained from a
strip mine Surface mining, including strip mining, open-pit mining and mountaintop removal mining, is a broad category of mining in which soil and rock overlying the mineral deposit (the overburden) are removed, in contrast to underground mining, in whic ...
in an environmentally degrading process. This sort of litter can be toxic to
ferret The ferret (''Mustela furo'') is a small, domesticated species belonging to the family Mustelidae. The ferret is most likely a domesticated form of the wild European polecat (''Mustela putorius''), evidenced by their interfertility. Other mus ...
s, leading to both respiratory and digestive problems.


Biodegradable litter

Biodegradable litters are made from various plant resources, including pine wood pellets, recycled newspaper, clumping sawdust, Brazilian cassava, corn, wheat, walnuts, barley, soy pulp and dried orange peel. Each year, more than two million tons of cat litter, or approximately 100,000 truckloads, ends up in landfills in the U.S. alone. Primarily this is not biodegradable or renewable and adds to the waste burden. Some pet owners prefer biodegradable litters due to its friendliness to the environment. Biodegradable cat litter can also be eliminated completely by safely
composting Compost is a mixture of ingredients used as plant fertilizer and to improve soil's physical, chemical and biological properties. It is commonly prepared by decomposing plant, food waste, recycling organic materials and manure. The resulting ...
the used litter at home. Other cat owners can be attracted to the biodegradable litters because of their flushability or deodorizing properties. Some pets, such as those with
asthma Asthma is a long-term inflammatory disease of the airways of the lungs. It is characterized by variable and recurring symptoms, reversible airflow obstruction, and easily triggered bronchospasms. Symptoms include episodes of wheezing, co ...
or sensitive senses of smell, may also benefit from the reduced dust in some forms of biodegradable litter. Biodegradable litter packaged specifically for cats tends to be more expensive than traditional clay litters, so cost is often not a positive factor in their selection. However, one of these, namely pine pellets can be purchased from regional feed stores that normally carry bags for horse bedding at a significant cost reduction, often cheaper than the cheapest clumping litter. Most biodegradable litters last longer than the equivalent size of clay or clumping clay litters. Grain-based animal or poultry feed also provides an economical alternative to products marketed specifically as cat litter. Additionally, most of these forms of litter are recycled from human usage and are thus reusing a waste product as opposed to drawing clay from mines.


Silica gel litter

Silica gel Silica gel is an amorphous and porous form of silicon dioxide (silica), consisting of an irregular tridimensional framework of alternating silicon and oxygen atoms with nanometer-scale voids and pores. The voids may contain water or some other l ...
litter, often referred to as "crystal litter", is a porous granular form of
silicon dioxide Silicon dioxide, also known as silica, is an oxide of silicon with the chemical formula , most commonly found in nature as quartz and in various living organisms. In many parts of the world, silica is the major constituent of sand. Silica is one ...
, has the highest absorbency of any litter, and has excellent moisture control and complete odor elimination for an extended period of time compared to other litters. Some owners praise its absorbency because can absorb liquid and odor for up to 30 days for one healthy normal weight cat. It is important to lightly stir the crystals daily while scooping the solid waste, otherwise urine can pool in the box. When crystal litter is saturated, at the end of 30 days or so, it begins to smell and is visibly saturated (the white crystals have turned slightly yellow). In comparison, over the same time period it may take or more of clay or clumping litter, because it is necessary to replenish the litter that is removed when the clumped urine is scooped out. No replenishing is necessary with silica gel (crystal) litter.


Types


Open litter pans

An open litter pan is generally the most basic and least expensive design. They are commonly constructed out of
plastic Plastics are a wide range of synthetic or semi-synthetic materials that use polymers as a main ingredient. Their plasticity makes it possible for plastics to be moulded, extruded or pressed into solid objects of various shapes. This adapta ...
, however some
disposable A disposable (also called disposable product) is a product designed for a single use after which it is recycled or is disposed as solid waste. The term is also sometimes used for products that may last several months (e.g. disposable air filte ...
models exist, in the shape of a rectangular tray with outwardly sloped sides high. Open litter pans allow for maximum ventilation which may increase cat comfort. However, they do show the waste most visibly and trap no odors which may encourage owners to scoop the box more frequently. Litter pans with low walls are not ideal for containing litter when a pet scratches or digs. Also, some animals who eliminate standing up may be able to urinate or defecate over the walls. Some designs include a detachable rim to help catch litter when the animal kicks to bury their waste.


Enclosed litter boxes

A variety of enclosed litter boxes exist that include both the tray and hood. Many are constructed out of plastic and feature a plastic hood or dome that covers the litter pan and litter. The pet enters through an opening in the cover, these may be open or have a swinging door. To clean, pet owners lift the cover off the tray to scoop and change the litter. Covered litter boxes may help reduce the amount of litter that is tracked outside the box, may help address issues of pets eliminating waste over the walls of a litter pan, and may help reduce odor.


Top-entry litter boxes

Top entry litter boxes have an opening on the top of the box and require the pet to climb on top of the box and into a hole to eliminate waste. While cats in good physical health, even kittens, have no problems accessing these boxes, they are generally not recommended for geriatric or physically limited felines. However, top-entry designs do have the added benefit of deterring other pets or young children from the contents of the litter box. Some designs feature a grate on top which allows litter from a cat's paws to fall back into the box, reducing litter tracking.


Self-cleaning litter boxes

Self-cleaning litter boxes employ technology that automates the litter box emptying procedure. Some models have electric combing mechanisms that automatically scoop the clumps out of the litter box into a sealed, disposable-bag-lined container after the animal has used it. These models use a pressure pad or an infrared light to determine when the cat has left the box and will comb the box after a pre-determined amount of time has passed to avoid disturbing the cat. Other designs take this one step further by connecting directly to a home's plumbing (faucet connection and drain) so they can wash, rinse and dry the permanent litter pellets automatically. Simpler designs exist as well; for example, some require the owner to manually shake the clumps into an easy-to-remove tray. Another variant has an enclosed sphere which rotates as it sifts out the clumps and deposits them in a drawer below the sphere. A new method involves incorporating sifting functionality within a sifting litter liner. Some automated litter boxes incorporate the use of a two-belt system. The top belt has litter ready to use while the lower belt has a batch of litter ready "on hold" for when the cleaning process takes place. As the litter on the bottom belt is moved up to the top, is it evenly distributed across the width of the top belt.


Disposable litter boxes

This newer design has increased in popularity with cat owners for their convenience, odor control and travel ability. These litter boxes are disposable and as such do not require going through any of the pain of cleanings or litter refills. Some disposable litter boxes may come with an included bag of litter or owners can choose to fill them with their own. They are also marketed for use inside of pet crates or carriers to eliminate accidents, and may also help control odors if they are thrown away and changed routinely. Once the product has been used to completion, owners can simply dispose of both the litter box and its contents.


Litter box furniture and cabinets

For cat owners who want to hide their litter pan in plain sight, many are moving towards litter box furniture. Cabinets designed to open and fit litter pans inside. Cats can access through a front, side, or top entrance. These cabinets are constructed of wood or wood composite and offered in different colors and styles, from traditional to contemporary. Features can include storage drawers, odor filters, wall liners, and external litter catches. While prices can vary from moderate to expensive, litter box furniture can help hide unsightly litter pans as well as contain litter odors.


Alternatives

Instead of using a litter box, it is possible to train cats and dogs to use a toilet Doing so significantly reduces waste, but for cats it goes against their instinct of burying waste. Combined with the requirement of jumping up onto the toilet, cats may find using a toilet stressful. In addition, excrement-based symptoms of medical problems are less likely to be spotted. There is also a higher likelihood of conflict with human use of toilets. Another option for animals to relieve themselves indoors is to use an absorbent ''potty pad'', also known as a ''puppy pad''. . The final option is to train your cat or dog to relieve themselves outside. If you have an outside area or yard you can easily train you cat to go outside this will be their natural instincts but for a dog it can be more challenging.


See also

*
Animal latrine Animal latrines (latrine areas, animal toilets, defecation sites) are places where wildlife animals habitually defecate and urinate. Many kinds of animals are highly specific in this respect and have stereotyped routines, including approach and de ...
* Cat intelligence *
Gravel Gravel is a loose aggregation of rock fragments. Gravel occurs naturally throughout the world as a result of sedimentary and erosive geologic processes; it is also produced in large quantities commercially as crushed stone. Gravel is classifi ...
* Litter boxes in schools hoax * Sandpit


References


External links

{{DEFAULTSORT:Litter Box Cats as pets Dogs as pets Urine Pet equipment Feces Rabbits as pets fr:Litière sv:Kattlåda