Verified answer

Because puppies are exploring a big world and nature gave them mouths. You need to stop him from doing it or expect some multi-thousand dollar vet bills.

Puppies should not eat rocks. Consult your vet about this, the dog may have a vitamin or mineral deficiency. Also, the rocks can cause health issues.

Is your puppy a lab? Labs like to eat rocks even though it is very dangerous.

The question should be, why do you allow him to? don't let your pup eat rocks!

They have nothing better to do