My 3-month-old puppy humps and bites. Is this normal? What to do?
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No, that much humping is not normal and Shadow acting aggressive when stopped is not normal. I recommend aggressive training. Start practicing: sit, stay, come, etc. He should have plenty of exercise: doggy daycare, walks, parks, one on one play. Keep a leash on him and use a gentle leader for the muzzle. When he start to hump, gently use the leash/gentle leader to make him stop as soon as he starts. Make him sit, give him a treat and play with him. Do not grab him or touch him where he can bite you. Humping is not always sexual in nature, but I would neuter him due this behavior and the aggression he is showing. Humping can also be due to anxiety or to show dominance.
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I hope this helps!
Updated on September 23rd, 2025