BayMax is the dog who is doing the chewing and Comet is the dog whose tags are getting chewed. Bay leaves his own tags alone and only chews on Comet's. We have chew treats in the house normally and only just ran out of them (both dogs go through them like water) but I've never seen this behavior on a dog before with another dogs tags. Bay is 9 months old and is a Jack Russell lab mix. I've only just noticed the behavior and have read ways to try and stop it but I'm hoping someone can explain Why he's doing it.