Puppies chew on your hair for the same reasons they chew on everything else: they’re teething, exploring the world with their mouths, or they’ve learned it gets a reaction from you. Hair is especially appealing because it’s soft, fibrous, dangling, and smells like you. The good news is this behavior is almost always normal and easy to redirect once you understand what’s driving it.
Teething Makes Everything Fair Game
Puppies start losing their baby teeth around 4 to 5 months of age, and the full teething process runs from about 3 weeks old until 6 or 7 months. During that window, the pressure of adult teeth pushing through their gums creates real discomfort, and chewing provides relief. Your hair, with its soft and slightly textured feel, can soothe sore gums the same way a chew toy does.
Even after teething ends, the chewing habit often sticks around. Puppies who spent weeks gnawing on anything within reach don’t automatically stop at 7 months. If your hair was available during that period and nothing redirected them, the behavior can become a go-to comfort activity well into adolescence.
Puppies Explore the World With Their Mouths
Dogs collect scent information through both their nose and their mouth. Puppies in particular use mouthing the way a toddler uses their hands: to investigate texture, taste, and smell. Your hair carries a concentrated version of your scent, plus traces of shampoo, oils, and whatever else you’ve touched throughout the day. For a curious puppy, that’s a rich sensory experience packed into something that’s fun to grab and pull.
This kind of oral exploration is a normal part of development and doesn’t signal a problem. It just means your puppy finds your hair interesting, which, from their perspective, it genuinely is.
Your Reaction May Be Reinforcing It
Think about what happens when your puppy grabs your hair. You probably laugh, yelp, pull away, or say “no” while gently pushing them off. To a puppy, every one of those responses counts as attention, and attention is the most powerful reward you can give a young dog. Even scolding or pushing them away can reinforce the behavior if the puppy interprets it as engagement or play.
Physical responses like pulling away are especially rewarding because they mimic a tug game. Your hair moves, you react, and suddenly the puppy has invented a new activity that reliably produces interaction with their favorite person. Once this cycle starts, the behavior gets stronger each time it plays out.
Stress and Overstimulation Can Play a Role
Occasionally, hair chewing is a displacement behavior, meaning your puppy is doing something normal (mouthing, grooming) at an odd time because they’re feeling conflicted or frustrated. This happens when a puppy wants to do two things at once and can’t, like wanting to greet you but also feeling nervous. The internal tension gets channeled into a repetitive physical behavior like chewing or licking.
If your puppy only chews your hair during specific situations (visitors arriving, loud environments, after being confined), stress or overstimulation could be the trigger. Puppies who are repeatedly placed in these conflicting situations may start performing the displacement behavior during any state of arousal, making it look like a random habit when it actually has an emotional root.
Hair Can Be a Real Health Risk
Human hair is made of keratin, a structural protein that dogs cannot digest. Most of the time, swallowed hair passes through the intestines and comes out in stool without any issue. But hair can tangle on itself or wrap around other material in the stomach or intestines, forming a mass called a hairball. If that mass grows too large to pass, it can cause a gastrointestinal obstruction.
Signs of a blockage include vomiting, abdominal pain, and lack of bowel movements. This is uncommon from occasional hair chewing, but puppies who regularly pull out and swallow strands are at higher risk, especially small breeds with narrower digestive tracts.
There’s also a chemical concern. If you use hair growth products containing minoxidil, that ingredient can cause severe heart problems and even death in dogs if ingested. Styling products, leave-in conditioners, and treatments may contain other compounds that aren’t meant to be eaten. A puppy chewing on freshly treated hair is getting a direct dose of whatever’s on it.
How to Redirect the Behavior
The most effective approach is simple: don’t punish, just swap. When your puppy goes for your hair, calmly remove it from their mouth, offer a chew toy, and reward them when they take it. The key word is “calmly.” No yelping, no laughing, no dramatic pulling away. You want to make your hair boring and the toy exciting.
Keep a few appropriate chew toys within arm’s reach, especially during the times your puppy is most likely to go for your hair (cuddling on the couch, lying on the floor together, bedtime). Three to five toys in rotation works well. Swap them out every few days so your puppy doesn’t lose interest and go back to your ponytail. Soft toys designed for teething puppies are a good match since they mimic the texture that drew your puppy to your hair in the first place.
One important rule: don’t offer old clothing or fabric scraps as chew alternatives. Your puppy can’t distinguish between an old t-shirt you’ve sacrificed and the one you’re wearing. Stick to items that are clearly toys.
Managing access helps too. If your puppy targets your hair during specific activities, tie it up or wear it in a way that’s harder to grab. Removing the opportunity while you’re teaching the replacement behavior speeds things up considerably. Most puppies lose interest in hair chewing within a few weeks once the attention payoff disappears and a better option is consistently available.