This game is so charming! I love the little walking animations that all the pets have. So adorable.
One thing I noticed, though, I could get all the pets to follow me by moving step by step and get them onto the carpet without ever using a single treat. Maybe don't make them auto-follow? That way you need to use the treats to get them to do what you want. Alternatively, you could make it so that each animal type has a different behaviour, for example dogs could aggressively follow you around, cats could be really aloof and not care about your presence at all and you have to use treats to get them to follow, and hamsters could be scared and try to hide, and you have to find them, use treats and lure them in.
A technical issue I noticed was if more than one pet is following you and they overlap, the audio gets really jittery, I assume it's because the audioplayer is getting a little confused as to which source takes precedence. It's not that big a deal.
I know it seems like I've said a lot of stuff, but I really liked this one, it was really cute, great entry, well done!