It does bother me that, aside from Streaky and his descendant, in general cats in the chronicles are evil and fitting opponents to dogs. Of course, since Krypto came first, and in folklore dogs and cats share an antagonism, the cats are logical choices as enemies.
That doesn't explain why a pet cat becomes evil just because its master is evil. This is the logic of the chronicles (see the Kryptonite Kid's dog, for example) but it is not usually true in real life.
That being said, I love the Phanty Cats and Streaky should meet them.
Would love to see something like that on the Cartoon Network "Krypto the Superdog" cartoon... too bad I hear it's probably going to be cancelled...