I feel their pain on that!! Like most Terriers, my little Ellie has not got the best power of recall, when she gets the scent of a rabbit, squirrel, fox or similar, she's offski, mostly chasing shadows, it's hillarious to watch
The advantage of a small dog that has a propensity to have a roll in an "interesting" pile of pooh (mostly fox or badger), is that she's easy to wash, I just take her in the shower with me, she loves that, not!!
Another advantage is that she can be picked up out of the way of danger when larger more threatening dogs come along, although she can outrun most. The number of people that I see struggling to cope with their larger dogs when they decide to have a "rumble" is, again, hilarious but also sometimes alarming.