In the first scene with the cat, his eyes change from yellow to white a few times. They are supposed to stay yellow.
Bird: Luckily I studied Karate.
(starts to slam the cat around)
Cat: I always said, Karate is for the birds.
Cat: Going down! (slams door and knocks Precious down into the basement) Grand slam! (locks door and pulls out key) Now here's the key to the whole problem.
Cat: How does this strike your funny bone? (hits Precious over the head with a bone)
Cat: I've got a bone to pick with that mutt.
Cat: What a cantankerous canine.
Cat: Wow. Cat-erstophe!
Cat: (to bird) Quiet, bird brain! Or you'll wake up sleeping beauty!
Cat: (to bird) How's about you and I have lunch together. You can be the lunch.
Cat: Meow-wow-wow! A bird burger with drumsticks, yet.
Cat: Well, hello there! Who said bird watching isn't any fun?