Americans love dogs, there’s no doubt about that. It’s estimated that the dog population in the United States is almost 80 million, and that 44% of households have a dog.

We typically get dogs when they’re puppies and form bonds that last a lifetime. It is when they are puppies that our canine friends are still a size we can manage and are perhaps the most irresistible. While they would perhaps never say it out loud, some dog owners may privately wish their puppy would never grow up — these are the states where people love dogs the most.

24/7 Tempo set out to identify the breeds that stay puppies the longest. Dogs reach adulthood at different stages. But some appear to stay puppies longer than others. We compiled the list based on a range of factors for which data were available, including life expectancy and size, as well as other more intangible factors such as temperament, playfulness, and cuteness.

Click here to see the 20 dogs that stay puppies the longest.