Look at the strap that is loose at the front of his throat. Max's is snug.. was urs loose?? maybe that was a factor?
Only on Leather, she has such a skinny face lol. On Timber it is waaay too tight, and my family won't be convinced otherwise! It drives me nuts that I'm the only one who wants to take care of my dog I wish I could get her a prong collar, the one I put on her before worked so well...