I am researching to see if hormones play a role, as my mares has them and my vet asked if she was quite dominant. This left me to the presumption that mares with dominant traits may grow male teeth? Eg. More testosterone (for example) makes the mare more dominant and therefore gains male traits such as tushes which can be used whilst fighting?
This is a complete guess and please if anyone has any references or research or knows anything please let me know