What to Expect from Your 9-Month-Old Puppy
Content Sponsored by 24Petwatch
If you had a tiny puppy at one point, chances are the pooch grew quickly. They soon became a gangly adolescent, and you might wonder when they will start behaving like a grown-up. At nine months, many dogs look like adults but still exhibit puppy behaviors. However, they should have grown out of the more inconvenient habits, like having accidents in the house and teething. It is important to learn how to care for a puppy at this age so that you may encourage good behaviors that last a lifetime.
Your Teenage Dog
Until they’re about four months old, puppies are unpredictable. However, they also tend to be small, roly-poly, and easy to deal with. After four to six months, they may mellow out to the point where you can forecast certain behaviors and get a sense of their habits. Just when you think this puppy care thing is going smoothly, they turn into crazy beasts again.
Nine-month-old puppies have been described as rambunctious teenagers. Your dog’s hormones are shifting incredibly at this time, leaving them with some erratic and impulsive 9-month-old puppy behaviors. Like human adolescents, teenage dogs are in a new phase of developing confidence and awareness. To solidify their learning during this stage, they tend to test boundaries and explore in ways that may not be appropriate.
You might wonder what happened to your sweet little snuggler. All of a sudden, Fido doesn’t listen to a word you say, can’t stay off of the kitchen counter, and inches their crate across the room when you’re not home. Everything seems like it has fallen apart. Some dog owners respond to this age by deciding that they need to rehome their puppies, but all hope is not lost. This is just a phase, and you can help your dog grow out of it successfully. On the other side is a mature, calm, obedient adult dog (with proper care and training of course).
Training an Adolescent Puppy
Training your puppy can often be a challenging and time-consuming task. Many pet parents feel overwhelmed, unsure of where to start or what to even do. To help support pet parents, 24Petwatch offers a complimentary year of Petcademy pet training with their Lifetime Protection Membership Plus. Get customized behavioral assistance, tips, tools, and resources uniquely tailored to your pet's age, history, and needs. Petcademy features easy-to-follow lessons with certified trainers that you can complete at your own pace. You never have to miss a class again.
According to Dog Star Daily, adolescence is a crucial time to socialize your dog. The behaviors that are reinforced during this era may stick around for the rest of their life. Many owners who brought their dog out and about with them when they were younger have settled into a routine that involves just seeing the same family members every day. Even if you go to the dog park or walk your dog, you probably follow the same route and interact with the same people and dogs.
If your dog doesn’t continue to experience unfamiliar environments, they can become progressively desocialized during adolescence. This can result in aggressive or anxious behavior when they are exposed to something new.
What can you do to avoid this? Continue to bring your dog to new places, keep meeting new canines, and make each meeting especially fun by offering your dog their favorite treats when you do something new.
The Physical Development of a 9-Month-Old Puppy
By the time they reach nine months of age, small breeds will be fully grown, but they’ll fill out over the next four months. Medium breeds may reach about 80 percent of their adult size by nine months. Larger breeds may still have a ways to go.
What else is going on in your nine-month-old pooch’s body? At this age, pups have all of their 42 permanent teeth. When puppies are actively teething, they tend to chew on everything. Most puppies have all of their adult teeth by six months of age. If your dog is still chewing on inappropriate items, perhaps they’re testing their boundaries. Give them plenty of appropriate chew toys. Remember, their teeth are much stronger than they used to be. Make sure that you monitor them while they chomp on a bone and take it away from them if it starts to seem like a hazard or gets bitten down to a nub.
Have you noticed that your puppy has started shedding like crazy? That’s because their coat changes at this age. They may lose their fluffy puppy down and start developing a more mature coat. Brush them regularly and get ready to pull out the vacuum frequently to keep pet hair at bay in your home.
What about puberty? Your dog is sexually mature by nine months. If the canine hasn’t been spayed or neutered, they can be responsible for fathering a litter or getting pregnant. If your dog is neutered or spayed, you may have heard that they won’t exhibit hormonal behavior. However, “fixed” dogs can still use urine to mark their territory or attract mates. Dogs tend to become more aggressive during this time even if they have been neutered.
Must-Have Items for Your 9-Month-Old Puppy
At nine months old, your puppy is full of energy, curiosity, and growing independence. To support their physical and behavioral development, it’s important to have the right gear on hand. From toys to training treats and travel essentials, here are some top picks to keep your pup happy, healthy, and well-equipped.
Product Spotlight: Jalousie 18-Pack Squeaky Plush Toys
Keep your puppy entertained and mentally stimulated with this super-value pack of squeaky plush toys. Designed for small to medium breeds, each toy offers a satisfying squeak and soft texture for safe chewing and play.
Highlights & Benefits
- Includes 18 assorted plush toys with built-in squeakers.
- Helps clean teeth, massage gums, and relieve stress through chewing.
- Made with high-quality, glue-free stitching for added safety.
- Ideal for supervised play and enrichment throughout the day.
Product Spotlight: Blue Buffalo Baby BLUE Training Treats
Make training sessions more effective and rewarding with these soft, bite-sized treats. Packed with real chicken and DHA for brain development, they’re perfect for reinforcing good behavior in growing pups.
Highlights & Benefits
- Real chicken is the first ingredient for a meaty flavor puppies love.
- Contains DHA to support cognitive development.
- Free from corn, wheat, soy, and artificial preservatives.
- Tender texture makes them easy to chew and ideal for training.
Product Spotlight: Cibaabo Dog Water Bottle with Food Container
Stay prepared on the go with this 2-in-1 travel bottle that dispenses both water and food. Whether you’re heading to the park or on a road trip, this portable solution keeps your pup hydrated and fed.
Highlights & Benefits
- Combines a 10oz water bottle with a 100g food container.
- Leak-proof lock and carbon filter ensure clean, spill-free hydration.
- Made from BPA-free, heat-resistant materials—dishwasher safe.
- One-handed operation for easy use during walks or hikes.
Product Spotlight: Mighty Paw Retractable Leash with Poop Bag Holder
Give your puppy room to explore while maintaining control with this durable retractable leash. Built for strength and convenience, it includes a quick-lock system and a built-in poop bag holder for hassle-free outings.
Highlights & Benefits
- 16-foot reflective nylon tape for safe, visible walks.
- One-touch braking system for instant control.
- 360° tangle-free swivel clip and U-shaped guide prevent jams.
- Includes a roll of eco-friendly poop bags for cleanup on the go.
These essentials help support your puppy’s growth, training, and daily adventures. Investing in the right gear now sets the stage for a confident, well-adjusted adult dog—and makes life easier for you too.
Things To Keep in Mind
If you’re having trouble controlling your nine-month-old puppy, remember that a tired dog is usually a well-behaved dog. You don’t have to walk for hours or run your pet around the dog park every day, even just engaging their mind with training, play, and puzzles can tire them out. Take the role of the pack leader and provide clear, consistent commands. Maintaining an appropriate puppy routine can help your pet have good manners. Soon, you’ll be wondering what to expect from your 12-month-old dog.