I just bought my dogs a harness a few weeks ago and have been using it on all their walks now, but I'm not sure how tightly it should fit to their bodies. Does it go by the same rule as the collar - that you should be able to fit 2 fingers between the dog and the harness? Or should it be looser than that? I've experimented around with it and I can't find an obvious "perfect" fit. Or maybe it just doesn't even matter. It fits my Lab mix pretty well as he's very round, but my Golden/Saluki mix has a very houndish build - her chest is quite thin, so the harness slides around on her a lot. The only concern I really have is that if she stops and the harness gets pulled it sometimes slides up her neck a little bit, but I can't see that it would be able to come off at all. I must be missing something here because I don't think harnesses should be this confusing [&:]