Owners in the US may well be feeding dog food to a German Shepherd or a Labrador Retriever as these are the most popular breeds.
According to the National Mutt Census, a survey conducted by Mars Veterinary, the Labrador Retriever is the most popular American Kennel Club (AKC) registered breed, reports MSNBC.
It also revealed German Shepherds are most popular as both as purebreds and mixes.
Angela Hughes, veterinary genetics research manager at Mars Veterinary, told the news provider: "The results of this poll provide a vivid snapshot of past and present trends in mutts.
Findings also showed that the Chow Chow, which was a popular breed in the 80s, is now often found to be the grandparent or great-grandparent of some mixed-breed dogs today.
Dr Hughes added: "The DNA of America's mixed-breed dogs tells a story of which breeds were popular in past decades. If a breed was trendy in the past, but has fallen from popularity, it may still represent a large portion of the current mixed-breed population."
Along with an online survey, the researchers also looked at 36,000 samples collected from mixed-breed dogs to determine the breed history of the pooch.
Recent research by Mintel revealed that that there are now around 8.3 million pet dogs in the UK.