You have gotten some great advice. It really isn't that expensive to feed a yorkie. We feed our cats and dogs premium foods and it doesn't cost that much monthly. Our cats go through a 15 lb bag of Blue Buffalo in a month, but when you calculate how much that it... it's around $1 a day to feed to very large cats. My dogs eat much less, so it's even less than that to feed one yorkie. So at fifty cents a day, you can't really go broke...
Good luck finding a good food for Cocoa