Disclaimer: I am writing this response with out reading the other.
I suspect they could probably evict you. That said, I've been at the same apartment complex (2 different units) for almost 3 years with 2 cats. My leasing office is only aware of one cat. My thought is, if they ask about the second cat, I can say that I'm just pet sitting for a friend. Of course, maintnance has been in since I've had two cats and some of the guys have seen and even petted BOTH my cats and I've never heard anything from the leasing office about it. I think most places have bigger things to worry about than someone having a cat.
I suspect they could probably evict you. That said, I've been at the same apartment complex (2 different units) for almost 3 years with 2 cats. My leasing office is only aware of one cat. My thought is, if they ask about the second cat, I can say that I'm just pet sitting for a friend. Of course, maintnance has been in since I've had two cats and some of the guys have seen and even petted BOTH my cats and I've never heard anything from the leasing office about it. I think most places have bigger things to worry about than someone having a cat.