those beta fish are not only hungry little devils but they are always getting dirty!
But if you want a break from feeding them you can put them up at the Pet Hotel and they will stay fed and clean and happy for however many days you put them in. However, I found I can only check in a couple pets at a time so I don't know if I am doing anything wrong in checking them in or that's how quickly the front desk person can handle them. But I can check them all in, just two at a time.
HOW TO CARE FOR YOUR PET: viewtopic.php?f=34&t=1520
PET HOTEL: pets.php?outlet=hotel