Garrett knows the drill too, I check his bottom when he poops. He gives me his butt and I lift his tail for a quick inspection.
 
If he's clean, he's good to go, but occassionally something goes astray

, then we go for the puppy wipes.  
My husband rolls his eyes but if I'm not present when Garrett poops, he' sthe first one to tell me to check his butt, it goes something like "Garrett, go give Mommy your dirty butt to wipe". 
The kids thought I was crazy untill I said ok, it's your bed he's on with his dirty butt....now they check him too 
