I THOUGHT I HAD ONE. BUT THE DOG SEEMS TO BE GETTING BETTER EVERYTIME . STARTED OFF DOING ABOUT 10 MINS BUT HAS BEEN BOLTING FOXES FOR FUN NOW AND EVEN STARTED DIGGING TO HER NOW. BUT SHE WAS A HANDY TOOL WHEN SHE WOULDNT STAY LONG ANYWAY. ANOTHER BONUS YOU CAN USE THE DOG THE NEXT DAY CAUSE SHE DONT GET KNOCKED UP TO BAD. BUT NOT EVERYONES CHOICE OF A TERRIER.