One area of training I have so far neglected is teaching my boy to tolerate a muzzle incase he was ever hurt bad enough to warrant one. I like the soft mesh muzzles for fitting in a first aid kit but am worried that it might do more harm than good if an accident happened in hot weather or if his breathing was in anyway affected by an injury. So that has me looking at basket muzzles. Also, what happens if a dog is in need of emergency oxygen at the time? Does the O2 mask replace a muzzle or can they fit over one? My boy has a wonderful temperament and very good bite inhibition but as taught in pet first aid classes, any dog can bite in the right circumstances. I want to make sure the instict to protect himself never prevents my boy from getting timely veterinary care and that training is done to prevent an unfamiliar muzzle from adding to his stress. Suggestions?