Just smoked my fist batch of polish sausage.it was a package kinda thing from the people that make big chief smokers .So I got a boston but ground it up and stuffed them.all was well they looked great.smoked them to temp of 158 then put them in an Ice bath for a few.they looked and tasted great I was really happy.I put them in the frig and a few hours later the had a few little wrinkles in them.just wondering why.