[Britster]

I've never heard of a grain-free food causing anal gland problems? That's odd-- I wish I could be of more help.

Jackson eats Acana Grasslands w/ no problems.

Hmm... the only thing I can think of, maybe, is that poos are supposed to be smaller yet firm on grainfree foods, so maybe if they're pooping less, their anal glands aren't getting enough of a 'push' or something? I really don't know, sorry!