Indoor Toileting Problems in Pets

Marking or toileting?

Indoor marking behaviour can be confused with a breakdown in toileting behaviour. Territorial marking by urine spraying which usually occurs against vertical objects such as chairs or walls and can be distinguished from urinating where a greater volume of liquid is deposited from a squatting position by both male and female pets. However, sometimes a small volume of concentrated urine is also deposited from a squatting position as a mark, and faeces can also be used to mark territory in a behaviour known as middening.

Why do pets toilet indoors?

One of the reasons dogs & cats make good pets is that they usually learn very early and with little effort from us that our homes are not toilets. Some individuals take longer to learn than others. Yet others develop clean indoor behaviour normally and then suffer a breakdown, perhaps as a result of illness and then fail to re-establish their previous clean behaviour.


Several aspects of the pets environment can be altered to try and treat the problem.

Cats & the litter tray

(a) Number of litter trays
One tray per cat is a good rough guide, as many cats do not like to share trays. Having tray in geographically separate areas, e.g. kitchen and laundry also helps.

(b) Type of litter
Several types of cat litter can be offered, such as Fuller’s Earth granule types, wood chip pellet, re-usable waxed granule varieties or finer grained litters. Cats often prefer finely grained substrates such as sand or a proprietary brand with sand-like texture. If the cat is to be allowed outdoors the litter can be mixed with soil from the garden to help transfer toileting behaviour completely to the outdoors later (ensure vaccinations are up to date).

(c) Cleaning
The litter tray should neither be allowed to get too dirty as this will discourage most cats, nor should it be cleaned too often as the presence of the cat’s own smell on the litter will help to develop the idea of a latrine. Solids can be removed regularly but the more cats use a tray, the more often it will need to be cleaned, but one per day per cats is recommended. (Cats don’t like litter that reaks of ammonia!).

(d) Security and position
An open litter tray in a busy part of the room may make some cats feel very vulnerable and they may prefer to eliminate (urine or faeces) behind the furniture or in a quite corner. Place the tray in a secure quiet place and either cover with an inverted cardboard box with a hole cut in it for entry and exit or buy a proprietary litter covered litter box. for those that seem anxious, although many prefer an open tray. Cats may usually be most unwilling to use a litter tray placed too close to a feeding area.

Encouraging use/preventing accidents

Confine the pet in a pen in a small room with only enough space for a bed, food & water. The pet should regulary be shown where the toilet is anre encourage to go there after & before meals. When the pet is successful at toileting in the correct area then positive re-enforcement is best with a pat & general affection. Access to the rest of the house should be allowed one room at a time and only under supervision for the initial introduction to each room.

Cleaning up

Before allowing access to any room, all previous unwanted toileting areas should be thoroughly cleaned using a proprietary ‘urine digester’ or a warm solution of a biological washing powder or liquid followed by a light scrubbing with an alcohol such as surgical spirit. (check that cleaning does not remove colour from carpet etc.) The area should be left to dry thoroughly before supervised access is allowed.

Other ways of increasing security

  • 1. Board up the cat flap where appropriate to help redefine the indoors from the outdoors and the safety of the home. This will also help manage the cat’s access to the indoors and aid supervision when there. It may help to put the cat out immediately after feeding as toileting sometimes follows. The cat should generally be encouraged to spend more time outdoors as the more he is out the greater the chance of needing to go to the toilet in a suitable place and its development as a latrine.
  • 2. Never punish a pet for a mistake. If caught in the act they can be picked up and placed in the correct toileting area & are stroked and calmed. Never ‘rub the pets nose in it’ as this will make a nervous pet even more likely to toilet indoors.
  • 3. The speed and success of treatment may be assisted by the use of certain drugs, particularly with nervous or agoraphobic pets. This option should be discussed with your Vet and only used in conjunction with the above suggestions.

Finally, in difficult cases, consultation with a Veterinarian can be rewarding because he/she has vast experience with these cases and many special tips that may help.

Get in touch with us

Four great Veterinary locations in Sydney Australia
  • Alexandria
  • Dee Why
  • Kingsford
  • Marrickville

Shop 1/138 Botany Rd
Alexandria NSW 2017
Phone: (02) 9698 4120
Fax: (02) 9698 4125

815 Pittwater Rd
Dee Why NSW 2099
Phone: (02) 9972 2044
Fax: (02) 9982 2307

70 Gardeners Rd
Kingsford NSW 2032
Phone: (02) 9662 6703
Fax: Fax: (02) 9662 8829

402 Illawarra Road
Marrickville NSW 2204
Phone: (02) 9558 2500
Fax: (02) 9559 3410

  • Alexandria
  • Dee Why
  • Kingsford
  • Marrickville


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