It's not necessarily a 'pet peeve' but having a degree in Marine Biology, I tend to use scientific names or species. If I was talking Chickens then I would use the term breed or breeds! but even then it's Gallus gallus.Most of us use the words breed, variety and species interchangeably..
Even though we know it's not correct.
That is a pet peeve of the elk man as well. Lol.