New horse in my horses paddock? hoping she doesn't get pregnant?

well if he is glued to your mares side then when u go out to retrieve ur mare dont shoo him away right away. pet him talk to him and give him some attention and then just bend down and look to see if he has balls,ihe does hes a ud thenu talk to the people and tell them that he cant be out there cause he is a stud and ll knock up the mares(yours included) andif not then maybe the horse just wants a friend and your mare is that onhim endnd rotection(ish)