Is your boss and co-worker male by any chance?
My boss is a male. He actually has a cat, a very old lady who he does EVERYTHING for. He just prefers dogs. (has 2 pugs)
My coworker is female. She has 3 dogs and is slighlty allergic to cats. Can work on most cats that come in the shop, but constant exposure would be impossible.

Both are just "dog" minded. And like it or not, there is a difference in personalities between dog and cat people (but there are also cat&dog people, and they too are different)