Never had this problem before with any of my own dogs but we have a Chihuahua dog puppy that will be spending a LOT of time at our house.
He is 5 months old very well bred from show lines and will be getting shown once he is 6 months old.
Problem is he is seriously over sexed ! He has picked 2 of my dogs that he will try it on with at every chance he gets, One being the 8 month old irish wolfhound puppy

I dont want to keep shouting NO because although it is a pain if he does well in the ring his owner will be using him as a stud
He has only been here for 3 days so I am hopeing things will calm down as he gets used to the place
Any Ideas ?