What happens when a dog wears a mask?

Wearing a mask can still scream, it makes no difference. Wearing a mask is for dogs not to bite. . . . .

Wearing a mask is bound to be uncomfortable, but it will not die, just like wearing a mask when we have a cold. Can things that don't belong to us constrain our activities? . . . . . . .

Don't worry, the puppy is not that fragile.

Using a mask alone can only cure the symptoms, not the root cause. Tell some dogs to be friendly and teach them well. Dogs are not freaks. My dog never uses a leash when crossing the road, including crossing the road. I told him to go, and he told me to stop.