How Big Do Cavapoos Get?

One of the biggest questions prospective Cavapoo owners have is how big their dog will get. Since Cavapoos are a cross between a Cavalier King Charles Spaniel and a Poodle, their adult size can vary quite a bit depending on which type of Poodle was used in the breeding. If you’re trying to figure out how much space you need or whether a Cavapoo is the right size for your household, this guide will help.

Most Cavapoos reach a height of 9 to 14 inches at the shoulder and weigh between 9 and 25 pounds when fully grown. They typically reach their full adult size by 12 to 18 months of age. The exact size depends primarily on whether the Poodle parent was a toy or miniature variety.

Cavapoo Size by Poodle Parent Type

The single biggest factor in determining your Cavapoo’s adult size is the size of the Poodle parent. Cavalier King Charles Spaniels are fairly consistent in size (12 to 13 inches tall, 13 to 18 pounds), so the Poodle side creates most of the variation.

Toy Cavapoos are bred from a Cavalier and a Toy Poodle. These are the smallest Cavapoos, typically reaching 9 to 12 inches tall and weighing 7 to 13 pounds. They’re great for apartment living and for owners who want a truly small companion dog that’s easy to carry and travel with.

Miniature Cavapoos are bred from a Cavalier and a Miniature Poodle. These are the more common size and typically reach 12 to 16 inches tall and weigh 13 to 25 pounds. They’re still considered a small to medium sized dog, but they’re sturdier and more robust than the toy variety. This size is popular with families because they’re big enough to be a solid playmate but small enough for easy handling.

Cavapoo Growth Timeline

Understanding how Cavapoos grow helps you know what to expect and when your puppy will reach their full size.

8 to 12 weeks: When you bring your Cavapoo puppy home, they’ll likely weigh between 2 and 5 pounds depending on the variety. They’re tiny and fragile at this stage, so handle them gently.

3 to 6 months: This is the fastest growth period. Your Cavapoo may gain about half a pound to a pound per week. By 6 months, most Cavapoos have reached about 60 to 75% of their adult weight. They’re starting to look less like a tiny puppy and more like a small dog.

6 to 12 months: Growth slows down but continues. Your Cavapoo is filling out and their body proportions are evening out. By their first birthday, most Cavapoos are very close to their adult height, though they may continue to add a bit of weight as they fill out.

12 to 18 months: Most Cavapoos are fully grown by 12 to 14 months, though some, particularly the miniature variety, may continue to fill out until 18 months. Once they’ve reached their full size, maintaining a healthy weight becomes the priority.

Can a Cavapoo Be Bigger Than Expected?

Yes, and this is something all Cavapoo owners should be prepared for. Because Cavapoos are a mixed breed, there’s no breed standard guaranteeing a specific size. Even within the same litter, puppies can end up at different adult sizes.

Several factors can cause a Cavapoo to be larger than the typical range. If the Poodle parent was on the larger end of the miniature size range, the puppies may be bigger. First generation crosses (F1) can sometimes show more size variation than multigenerational Cavapoos. Overfeeding during puppyhood can also lead to a larger adult dog, though this is usually excess weight rather than healthy growth.

If you’re concerned about your Cavapoo’s final size, ask the breeder about the parents’ sizes. Meeting or seeing photos of both parents gives you the best estimate of how big your puppy will grow. A Cavapoo that loves to cuddle is wonderful at any size, so don’t stress too much about hitting a specific number.

Diet and Exercise for a Healthy Sized Cavapoo

What you feed your Cavapoo and how much exercise they get directly affects their size and overall health. Here’s what to keep in mind.

Feed a high quality dog food appropriate for small breeds. Small breed formulas have smaller kibble pieces and calorie levels designed for smaller dogs. Follow the feeding guidelines on the package as a starting point, then adjust based on your dog’s body condition. You should be able to feel your Cavapoo’s ribs easily but not see them.

Cavapoos need about 30 to 60 minutes of exercise per day. This can include walks, playtime, fetch, and mental stimulation activities like puzzle toys and training sessions. Cavapoos have moderate energy levels and don’t need extreme exercise, but regular activity prevents obesity and keeps them mentally sharp.

Watch for weight gain, especially as your Cavapoo gets older and their metabolism slows down. Obesity is a common problem in small dogs and can lead to joint issues, heart disease, and a shorter lifespan. If your Cavapoo is gaining too much weight, reduce portions slightly and increase exercise before the problem gets out of hand.