Personally, I think Animals should be given the same traits as Human Sims, but leave out "Handy" "Natural Cook" "Artistic" and others. I can tell you I have caught my cat swatting at imaginary pixies, catching a fly with his mouth, and eating it, running around in the same autonomous fashion as Dorie and her husband Gus from time to time, and even sitting in the bath tub, and on the toilet. So I don't see why EA can't just give the same traits as human Sims.
Pets can be snobs too. Anyone see the fancy feast commercials with that white Persian who is very specific about his cat food?