pets and human

manage to adopt a golden retriever, sammy as pet lately.
not really a pleasant thing to happen since she did kinda create lots of trouble especially towards my wallet.
yet, she did somehow helps to release some of my stress by just jumping around, stand, give me her hand, eat well and fetch a ball without returning it.

but there's some stuff that i dun really understand.

1. why can't pets bath as frequent as humans?
2. why islam has so much restriction?? (which honestly i found it to be pretty stupid)
3. why can't pets eat like us human??