I have a yorkshire terrier who is 13 weeks old. He is not the tiny sort more of a standard size!! I am worried about using a collar incase he tries to wiggle out of it. However I have yet to find  harness that fits at the momment despite him being a sturdy little chap. Any ideas suggestions?

Hi, I've been finding it very difficult to find a collar that fits my Papillon pup, he is tiny, so I know the feeling. A CAT harness would probably be a good idea! :)

or a rabbit one

I found one in our local Jollyes that fit my Cavalier at 10 weeks, so there must be some to fit a Yorkie! Ferret harnesses might also work?

Wouldn't use a harness on a small breed puppy at all..... it tends to arch his back while he's still growing up. I guess it would be okay if he wasn't pulling, but show me one puppy that doesn't. This was told to me by quite a few Chihuahua breeders and my vet. It applies to all small breeds.....