Some sausage is GF, some is not. It depends on the brand or the processing. The only way to know is to call the place that made it. In your case...you'd have to call the meat market that processed your son's sausage. You not only have to ask about wheat, but also barley, rye & oats.

For instance...many Johnsonville products are GF (not the beer brats tho)

http://www.johnsonville.com/siteconf...ENFREEPRODUCTS