my pup is on the Go Natural food (chicken). She is 5 lbs and eats half a cup/day. It is a little more expensive, but worth it - its good for her & these guys are so small a big bag lasts a long time!
mine is in an ex-pen, they are so good in terms of giving the pup a safe, secure space. you can put your pup's crate in there, mine has hers in there along with a pee pad, food and water, chewy. at least it will keep yours off the carpet?
congrats on adding Ziggy to your family - looking forward to seeing pics!