Yes, oatmeal is also used as a bedding/food I believe. It is just a little harder to sift out when feeding them to the birds, but then again that probably is not necessary. I used to use both oatmeal & wheat bran mixed, and it was fine – like I say just harder to sift worms out with the oatmeal. I bought from Grubco for about 7 years & now I switched to Nature’s Way, also from Ohio. Seems like their shipping methods are much better to where I live, but their worms are about the same size, price, etc. as Grubco. Amazing that your worms stayed that long from last summer to March – did you not have any blues to feed during that period?