The most common behavioral problem experienced by cat owners tends to be inappropriate elimination. This is a frustrating problem but in our experience, at least 90% of it is caused by poor litter box setups and conditions/health issues/family issues. Cats DO NOT eliminate outside their boxes in order to “get back” at their owners. There is always a reason.
First, the most important thing that needs to be done is a thorough vet exam, including a urine sample to check for infections. Once this is ruled out, a careful examination of the litter box set up is in order. Cats also have issues due to stressors such as fighting in the household, a new baby, a new pet, inter-cat aggression, etc. For a thorough discussion of these issues as well as good suggestions on how to address them, please visit Cats International.