Ok, I've been meaning to ask about this with Skipper....now I really need to since I have to use a harness on him instead of a training collar - either prong or chain - because of his collapsed trachea.

Here's the thing...although the girls will certainly sniff at things and try to follow their noses...Skipper becomes really excited about it.  He will find a scent and go nuts following it....it's like a bloodhound on the scent of an escaped convict!  He forgets he's on a leash, trips me up, zig zags around while following some scent in a very excited way.  Sometimes it's a mole and he'll start frantically digging at a hole in the ground....more often it's something else that we never see.

Mitzy and Mayfly are about equally sight - smell hounds.  But Skipper acts like a foxhound on a hunt!  Any ideas, thoughts?  Maybe I should not worry about it and just let him do it?