I prefer a harness, because I've heard collars can increase trachea problems these little guys already are prone to. But I used a collar for obedience and will take her out on collar once in a while to work on obedience.
Trixie wears a sweater or coat outside, and I put the harness OVER the clothes. Because usually the whole in the sweater or coat is on the 'height' for a collar. It works fine!
__________________  Trixie |