Friday Fails: Who is Training Whom??

Given Butterball's love of food and his propensity to potentially, maybe, try to take advantage of situations on occasion, we have pretty strict rules about food when I'm interacting with him. Unless I say "snacks" he is not allowed to snatch grass. Once I start to do anything other than passively hold the lead rope, he has to stop eating and stop trying to eat. 

But he found a loophole and is definitely exploiting it. 

He's noticed that I let him eat grass while he pees. I certainly don't want to discourage him from peeing when needed, especially when he is peeing before going into the trailer. However, we now have a lag time of 30-45 seconds from when he postures, starts to eat, and then actually starts peeing. Goober!