Kevin Bacon is amazed by the information DNA tests reveal.
The 54-year-old actor is married to actress Kyra Sedgwick and the couple share two children together.
The family rescued several dogs including Lilly, a Labrador, American bulldog and Boston terrier mix, and a little canine that belongs to Kyra and Kevin's daughter Sosie. Sosie's dog was found roaming New York City streets.
Kevin discovered his pooches' genetic background through home dog DNA test kits that he bought on the Internet.
"We did DNA testing, which is fun and something that just became possible," he told People magazine.
"What you do is swab the cheek of a mutt and you send it in. What comes back is what breeds are in the animal, which is really cool.
"The strange thing with my daughter's dog, it turns out he's a purebred. A purebred Staffordshire terrier."
Kevin enjoyed investigating his dogs' heritage so much he decided to share his new hobby with family over Christmas.
"[My sister] wrote me back this email that listed probably six or seven breeds in her dog," Kevin shared.
"Her dog's name is William and she said, 'I'm so disappointed to find out about William's slutty past!'"
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