Pit-bulls are the most common type of dog, in dog fights.
yes actually the most common cause for fighting was fighting for horses
The Lemon breed for derby fighting are one of the most common breeds and very popular in the Philippines. The Lemon breed is a light red color with a yellow color hackle.
It would be the Angus breed.
The Holstein breed.
Angus cattle are the most common.
Fight Club
Merinos
America did some fighting on German territory, but the Russians did most of the fighting.
most hamsters fight when another sex is in there or you may think there fighting when there breeding.......
There are no 'breeds' of chinchilla, but the most common colour is a standard grey
I know the American Shorthair is a pretty common cat, but it might not be the MOST common. :)
mutt breed cats are most common but after that is the tabby cat