LOS ANGELES — Imagine the ideal designer dog. It would be smart, healthy and hypoallergenic. It would have the yap bred out and longevity bred in. And, most important, it would never lose its puppy face.

Enter the “cava-poo-chon.” The breed is the newest and latest in the decades-old search for the dog-face fountain of youth and perfect pet accessory. But the American Kennel Club does not recognize the new trend as an official breed, and one expert calls some specially bred small dogs expensive “gimmicks.”

“There’s always been a market for these forever-ish young dogs,” said veteran trainer Steve Haynes of Fidelio Dog Works in Austin who is working with 50 first-generation cava-poo-chons. “Until recently, specialized dogs like miniature Yorkies and miniature Maltese were the go-to dogs.”

The cava-poo-chon is a cavalier King Charles spaniel and bichon frise mix bred with a miniature poodle. With the help of a geneticist and reproductive veterinarian, the tribrid or “triple cross” was created by Linda and Steve Rogers of Timshell Farm in Pine, Ariz.

With a price ranging from $2,000 to $3,500, the cava-poo-chon combines the best of the three breeds, Linda Rogers said. She added that there is no reason they can’t live for 20 years. The dogs weigh 10-15 pounds on average and the Rogerses offer a choice of color and two types of coat – curly or very curly, she said.

So far, 58 families have returned to get a second cava-poo-chon, and 12 of the dogs have been certified to work in nursing homes and hospitals as therapy dogs, Rogers said.

Amy Wolf of Austin said she found her perfect dog in the breed.

“I can’t tell you the number of times a day I look at her and say, ‘You are so cute.’ ”

Not only that, her 3-year-old named Callie has become the love of her husband’s life – despite his allergies – and enchanted all their new neighbors. She hired Haynes as a trainer.

“Never have we had a more loving, sweet dog. She wants to say hello to everyone,” said Wolf, who moved into a new home with her husband two months before getting Callie.