3-Month-Old Puppy: What to Expect and How to Train

By Tailwisp Editorial TeamUpdated October 17, 20263 min read

Three months is when many owners think they have things figured out, and then their puppy changes again. Your puppy is bigger, bolder and a lot smarter than it was a few weeks ago. With the right approach, this is a rewarding age to train.

Growth and development

Puppies may gain weight quickly at this age. Legs lengthen, and coordination improves. Many are in a rapid growth phase, so feed the right food and avoid overfeeding. Ask your vet to monitor weight. Our puppy growth and weight chart shows typical patterns by size.

Toilet habits

Bladder control is improving. Many puppies can wait three to four hours during the day, but not overnight without a break. Accidents still happen, particularly with excitement or distraction. Keep to a regular schedule, reward success and clean accidents calmly. See our potty training schedule by age.

Training

• Basic cues: Sit, down, stand, come and wait.
• Leash manners: Practice walking on a loose leash in the yard or quiet streets.
• Impulse control: Teach your puppy to wait for food and doors.
• Recall: Keep it fun and rewarding. See the recall training guide.
• Handling: Continue gentle grooming and vet-style exercises.
• Alone time: Gradually increase.

Sessions of five minutes or less keep puppies engaged. Use small, tasty treats, and end on a success.

Biting and mouthing

Biting often peaks around this age, as puppies play roughly and teething approaches. Redirect to toys, pause play when teeth touch skin and reward gentle behavior. Provide plenty of safe chews. Our guide to stopping puppy biting and mouthing has detailed strategies.

Socialization

Keep exposing your puppy to new experiences. If your vet has cleared your puppy for outings, visit new places, meet friendly dogs and people and practice calm behavior. Keep each outing short and fun. Our socialization checklist offers ideas.

Feeding

Most puppies eat three meals a day at this age. Choose a puppy food appropriate for the expected adult size, and avoid overfeeding. Use treats sparingly. See our feeding chart by breed size.

Exercise

Provide short walks, play and mental stimulation. Avoid long, repetitive exercise that can harm developing joints. Let your puppy rest. See exercise limits by age.

Health

Continue vaccinations, worming and parasite prevention as scheduled. Start dental care by introducing a toothbrush. Check ears, eyes and skin regularly. See our puppy vet checklist.

Common challenges

• Chewing: Give plenty of chews and manage the environment.
• Jumping up: Reward calm greetings and ignore jumping.
• Barking: Meet needs and avoid reinforcing attention-seeking barking.
• Separation distress: Keep absences short and calm.
• Zoomies: Provide safe space and let your puppy burn off energy. See our guide to puppy zoomies.

Understanding the three-month-old mind

By twelve weeks puppies are starting to link actions with consequences far more quickly. That is wonderful for training but also means accidental lessons stick. If barking at the fridge earns a piece of cheese once, your puppy will try it again. If grabbing a sleeve makes people squeal and play, grabbing becomes a favorite game.

Use this to your advantage by reinforcing what you like on purpose. Carry a few treats in a pocket and reward spontaneous good behavior: sitting politely at a door, lying quietly while you cook, choosing a chew toy instead of a shoe. Three-month-olds also begin to show early preferences, such as favorite toys and favorite people. Notice what motivates your puppy, whether that is food, tugging or praise, and use it as a reward for the hardest tasks.

The takeaway

Three months is a time of fast progress. Stay consistent, keep training fun and give your puppy plenty of outlets for energy and curiosity. See our 4-month-old puppy guide for what comes next.