My dog has hated corgis since he was a puppy. He has never had a negative experience with a corgi, but every time he sees one, he starts to growl and get aggressive. Other than that he is a super friendly dog, and he is always playful with other dogs and cats. Does anyone know what could cause this? He is a husky/bull mastiff mix. Currently 17 months old.

To be clear, he has never been closer to a corgi than roughly 3 feet. He will stop and growl at them if we run into them on a walk, and he has tried to lunge at them before. The home he came from only had two dogs (his mother (mastiff) and a golden retriever, he was an accidental litter between his mom and the neighbor’s husky). I have had him since roughly 8 weeks old and he has never had that reaction to any other breed of dog. I try to avoid them but they seem to be popular in this area, as there are about 8 in my neighborhood lol.