Canola oil is usually included in dog foods because it is a source of both calories and fat. It also provides your pooch with Omega 3 acids. Canines aren’t able to make Omega 3 acids themselves, so they need to get it from their diets. One commonly known Omega 3 acid is DHA, although it should be known that canola oil doesn’t include DHA. Rather, it includes ALA, which dogs can then turn into DHA (although not super effectively).
So, in short, canola oil is usually added to kibbles like Kirkland dog food for fat and calories. If you’re looking specifically for something that includes DHA for your dog, one more effective source is salmon oil.