We had a backpack designed to carry a small dog or cat for our corgi, but she outgrew it in short order. It had a mesh panel so she could see out. I doubt a chahooy dog would ever get too big for such a thing. I think it came from Petsmart.
Don't forget though, when you are that small, your best chance of surviving lies in getting scared and running. So, take care to work him into it slowly and carefully lest he have a heart attack.
