When a puppy mouths, he is constantly putting his mouth on your hand, your arm, leg or anything that belongs to you, including shoes, socks, clothes, etc.
Reasons Puppies Mouth:
- Teething. The first set of teeth comes in 3-4 weeks after birth. Permanent set of teeth start coming in at 6 weeks and this process can last until the dog is 6 months of age. During this time a dog’s mouth can become very sore, inflamed or bled. Mouthing is a way a dog can relieve some of this pain.