No. don't grow tatties but we feed a hell of alot to the dairy cows, stores, sucklers etc. Arable farm about 10 mins from us grows about 300-400 acres of them, so we get all the tatties that don't make the grade as they bag and sell most of them. We get through about 15-20 ton a week say. The cows go crazy for them especially the dairy's, they practically run to the feed barriers when the wagon comes down. It's also cheaper to feed than rolled barley, maize etc and to be honest they do seem to do aswell most of the time.
Finished rambling :D