Why does a good cat go bad after several years of being good?

Answer 1

Cats, like people, never act without reason. The key is understanding their reasoning.

As cats mature they may lose much of their "kittenish" behavior. If they are still expected to play, they may turn surly and in a very definite way make it clear they have no wish to do this anymore.

As cats advance in years, their tolerance can drop again, especially if their faculties begin to diminish.

The loving owner will accept and respect their wishes as well as take care to help them as they age. For instance, I had one cat who lived quite long but lost most of his fur in the last years of his life. I provided a sweater for him in the cold months and, once he saw the advantages of it, accepted it.