Not trying to put you or your dogs down Dev, but that works out at roughly 10 digs per dog all season which isn't a lot in fairness, wouldn't you rather have 2 dogs with 20 odd digs a piece?
3 of them only started this season, one pup had 3 digs towards the end of season, 2 other pups had 7 digs each, my bitch had 12 digs as she missed the first part of the season due to pups.and my dog had 19 digs.
dogs are easily lost rabbit hunter as im sure you know,if i had only 2 with 20 odd digs each then i would now be down to a single terrier as i lost my dog after his last dig. it suits me much