The presence of urine and/or faeces outside the litter tray is not definitive evidence of a behavioural problem; medical causes and underlying factors should always be ruled out before reaching a behavioural diagnosis. In multi-cat households, it is therefore important to [[Housesoiling - Cat#Identifying the Culprit|identify which cat is responsible for the housesoiling]]. It is extremely unusual for a non-resident cat to enter and eliminate in another cat's home, but this may also need to be considered. | The presence of urine and/or faeces outside the litter tray is not definitive evidence of a behavioural problem; medical causes and underlying factors should always be ruled out before reaching a behavioural diagnosis. In multi-cat households, it is therefore important to [[Housesoiling - Cat#Identifying the Culprit|identify which cat is responsible for the housesoiling]]. It is extremely unusual for a non-resident cat to enter and eliminate in another cat's home, but this may also need to be considered. |