You can find rose hips at Petsmart, they are in little packages for about $1.50 and you get a decent amount. For one chin it'll last awhile, for more than 1, you might need a couple. But anyway, don't know if you've seen them or not, they are in the bird section usually, they are sold as something to mix into bird food for large parrots.
So anyway, I feed rose hips, papaya for digestion, oats, dried macaroni, piece of calf manna, or shredded wheat. Those are the healthy treats, and since i have such a variety I give him, he thinks he is getting something new everytime because he'll get calf manna then it'll be awhile before he gets it again, since he doesn't get all this everyday or all at once.
As for sugary treats about once a week he gets either dried fruit (bananas, apple or kiwi) raisin, crasin, or a dried blueberry.
My chin is so spoiled.