First of all, what is a peptide? A peptide is made of amino acids, just as proteins are. You could think of a peptide a simple/small protein kind of thing. You can also check out peptide definition.
This particular peptide is called cathelicidin and what is special about it is that it kills microbes like bacteria, viruses and yeast.
Dogs do produce this peptide in their bodies. But sometimes it seems nature needs a little help.
The researchers at Kansas State University used the canine genome to isolate a cathelicidin peptide found in the white blood cells of dogs. Then they figured out a way to synthesize it.
They are hoping to use it to help dogs fight chronic infections, such as otitis, dermatitis and urinary tract infections.
It would be particularly useful for dogs who don't respond well to conventional medications.
Source article: Patent Awarded for Synthetic Canine Antimicrobial Peptide
Kansas State University Release: Going to the dogs: University's newest patent for improving canine health