More than one cat may be involved, and it should be remembered that, in some cases, the culprit for indoor marking may not be a resident cat at all. Intact male cats and despots may enter the homes of other cats to obtain food or shelter, or to oust the resident cat. They may then leave urine spray marks within the home. In these cases, treating the resident cats will have no effect on the marking behaviour and, in fact, increasing the level of resources available within the home may raise its value and therefore encourage the invading cat to enter more frequently or try to take over the territory. It is also important to remember that neutered male and female cats spray mark at around the same frequency, so the sex of cats in a household is not a reliable means to identify the culprit. | More than one cat may be involved, and it should be remembered that, in some cases, the culprit for indoor marking may not be a resident cat at all. Intact male cats and despots may enter the homes of other cats to obtain food or shelter, or to oust the resident cat. They may then leave urine spray marks within the home. In these cases, treating the resident cats will have no effect on the marking behaviour and, in fact, increasing the level of resources available within the home may raise its value and therefore encourage the invading cat to enter more frequently or try to take over the territory. It is also important to remember that neutered male and female cats spray mark at around the same frequency, so the sex of cats in a household is not a reliable means to identify the culprit. |