When Do Cavapoos Stop Growing?

Most Cavapoos reach their full adult size between 12 and 18 months of age. Because Cavapoos are a mix of Cavalier King Charles Spaniels and Poodles, the exact timeline depends on the size of the Poodle parent. Cavapoos bred from toy Poodles tend to reach full size earlier, while those from miniature Poodles may take a bit longer to fill out.

Your Cavapoo will do most of its growing during the first 6 to 8 months. After that, growth slows down significantly, and the remaining months are spent filling out and maturing rather than getting noticeably taller or longer. By their first birthday, most Cavapoos are close to their adult height even if they have not yet reached their final weight.

How Big Do Cavapoos Get?

A fully grown Cavapoo typically weighs between 9 and 25 pounds and stands about 9 to 14 inches tall at the shoulder. That is a pretty wide range, and where your dog lands depends mainly on the size of the Poodle parent.

Cavapoos from toy Poodle parents usually stay on the smaller end, weighing around 9 to 15 pounds. Those bred with miniature Poodles tend to be larger, ranging from 15 to 25 pounds. If you want to predict how big your Cavapoo will get, look at the parents. The size of the Poodle parent is usually the biggest clue.

Cavapoo Growth Stages

Birth to 3 months. This is a period of rapid growth. Your Cavapoo puppy will gain weight quickly and seem to grow overnight. Puppies at this age need frequent meals, usually 3 to 4 times a day, to support their fast development.

3 to 6 months. Growth continues at a steady pace. Your puppy will start looking less like a round little ball and more like a proportional small dog. This is also the teething phase, so expect some chewing and possible changes in appetite.

6 to 12 months. The growth rate starts slowing down. Your Cavapoo may reach its adult height during this period but still needs to fill out in terms of muscle and body mass. You can usually switch from puppy food to adult food around 10 to 12 months with your vet’s guidance.

12 to 18 months. Most Cavapoos are done growing by now. Any remaining changes are subtle, like a slight broadening of the chest or a tiny bit of weight gain. Your dog’s coat will also mature during this time, potentially changing in texture or curl pattern.

Factors That Affect Your Cavapoo’s Size

Genetics. The single biggest factor is the size of the parents. A Cavapoo from two smaller parents will almost certainly be smaller than one from larger parents. If you got your puppy from a breeder, ask about the sizes of both the Cavalier and Poodle parents.

Nutrition. Proper nutrition during the puppy stage supports healthy growth. Puppies that are underfed may not reach their full potential size, while those that are overfed can grow too fast, which puts stress on developing joints and bones. Feed a high quality puppy food in appropriate portions for your dog’s age and expected adult size.

Generation. Cavapoos come in different generations (F1, F1B, F2, etc.), and the generation can influence size. An F1B Cavapoo that is 75% Poodle may be slightly different in size than an F1 that is a 50/50 mix. Breeders can usually give you a good estimate based on the specific cross.

Spay or neuter timing. Some research suggests that dogs spayed or neutered very early may grow slightly taller than intact dogs because the growth plates stay open a bit longer. The difference is usually minimal, but it is something to discuss with your vet.

How to Tell If Your Cavapoo Is Still Growing

The easiest way to track your Cavapoo’s growth is to weigh it regularly. If the weight is still going up month to month, your dog is still growing. Once the weight stabilizes for two or three months in a row, your Cavapoo has likely reached its adult size.

You can also look at the paw size. Puppies that still have oversized paws relative to their body usually have more growing to do. Once the paws look proportional to the rest of the dog, growth is mostly complete.

Your veterinarian can check your dog’s growth plates on an X ray if you are curious about whether more growth is expected. Open growth plates mean the bones are still growing, while closed plates mean growth is done.

Keeping Your Cavapoo at a Healthy Weight

Once your Cavapoo stops growing, maintaining a healthy weight becomes important. Cavapoos can be prone to weight gain, especially if they are not getting enough exercise or are eating too many treats. An overweight Cavapoo is at higher risk for joint problems, heart disease, and diabetes.

You should be able to feel your dog’s ribs without pressing hard, and there should be a visible waist when you look at your dog from above. If your Cavapoo is looking a little round, talk to your vet about adjusting portion sizes and increasing daily exercise. Regular activity keeps Cavapoos happy, healthy, and at the right weight.