[Rachael1983]

Have you considered taking your dog to training? I think this will help you get results on behavior on potty training, walking , listening, etc.

I’ve not seen such a harness that you’re describing. Also are you confirming that your putting the harnesses on correctly ?

Your dog doesn’t look very small or fragile but maybe you should consider the collar only since you’re having escape and sizing issues . I know you’ve read about collapsed trachea for small breeds but from your pictures the anatomy of your dog I think I would consider training and collars moving forward.