How about sprouting those wheat seeds and feeding the sprouts to your peeps? They will benefit from the greens and the nutrients. Old seed should still sprout. The oil might be rancid, which argues for sprouting the seed rather than feeding it whole.
You could also cook it like oatmeal and feed it that way -- again avoiding the problem of impacted crop. I dont feed too much whole grain at one time. I like to mix whole grains with greens (lettuce, broccoli leaves, fresh grass clippings) and/or leftover people food, such as cantaloupe seeds, pumpkin innards, giant zucchini, bread heels, etc.