as with any dog the chance of one failing depends on the amount of work it is going to see, a terrier that gets dug to the odd weekend would have been the dogs bollocks to its owner down the pub, a legend when it's gone .
but maybe if the terrier was out 2 or 3 times a week digging, its very possible that it would have been remembered as that pile of shite so n so bred, it might not have even been remembered.
i've seen this with plenty of lurchers, scar'd to f**k, the owner bragging about how it wrecks foxes etc etc, then when it gets 3 or 4 foxes put in front of it in the night, it s