it would be a great idea if you could feed something to a pet, though it couldn't die of hunger (i think) it would at some realism to the game. Maybe they could also grow, when it reaches a certain amount of in-game days it reaches the next stage of life, were its bigger, and maybe has different appearence. When it reaches the last stage it stays that way ( or dies after a while, dev's choice). And maybe whe they get big enough some pets cn also be used as mounts? In this form you go faster when running. Also maybe pet combat, were it helps you fight. In both combat and mount mode it should have a seperate stats window that shows health, mana, physical stamana, ect. And maybe if the pet dies it gets unsummoned and can't come back for the whole day.
I would love it if pets could stay more then three minutes, when the abuse risk is gotten rid of, maybe ith the sign post idea or something. an when the masonry skill comes, mabe we could make pet stuff? Who knows.