Dog wearing a man shirt

Clothes aren't good for your pet for several reasons. One reason is that they will chafe your pet. Where a human can scratch an itch under their clothes or adjust them, a dog can't

There is no harm in putting clothes on your dog. If you are still on the fence consider this: dogs come equipped with their external coats but some dogs have lighter layers than others. Many dogs are not genetically suited to the environments in which they find themselves.

One reason behind the calming effect of dog clothing can be the mild pressure applied by the clothing on the dog. The constant pressure on a dog's torso works like medicine which creates a calming effect.