Mine only wears them when we are going walking. I had the same problem as you did as the harnesses being too bulky for my little one. Mine little girl is 2.5 pounds and I have tried so many harnesses but never liked any of them and she didn't like them either until we got one from a yt member chattiesmom. She made me two for both of my yorkies and I love them!!! For my little girl it's not bulky, heavy or anything, it's just perfect and she doesn't even mind it being on her at all and it doesn't pull her hair either. So you may want to look into that. They are very well made harnesses and I wouldn't use any other now that I tried her's .
