Welcome to Subeta! Basically you go to your Inventory (by pressing 'Personal' on the top nav bar), click on a food item, and select feed to PETNAME.

You can also put them into the lodges located at Veta Lake & Omen Islands, to make sure they are fed/happy.

Feel free to tell us a bit about yourself if you like, and feel free to ask if you've any other questions!

Useful Links:

What to do on Subeta? Useful general information for newbies Finding friends (Chit Chat) SubetaLodge (Offsite item database, pet colours etc.)
FAQ