My 20-week old girl is bursting out of her small size soft harness, and I ordered a medium size only to find out the neck is much too large. She has a 14 inch girth (around the middle, behind the legs) and a 9 inch neck. Her weight is not quite 10 pounds. Ideally, I could use a harness that adjusted at the neck AND the girth, but have not seen anything like this. Any ideas? Thanks. I'm learning so much my reading posts here.