I have one horse that keeps taking the other horses halters. I don't leave them in halters all the time but, if they are within his reach he takes the halter. He will also take halters off the fence. Is this just playful? There is nothing like trying to get a halter away from a 15hh gelding. I am only 5'2" and when I get him to be still he pulls his head way up so I can't reach it.
Once I made the mistake of putting my Amigo in the field next to him with a halter on, I hadn't even made it to the gate when I turned to see Pistol leading him down the fence by his halter.
Also when he is finnished eating.... he will pick up his feed bucket and toss it over the fence. He is 10yr old.... when will he stop playing?