pennys...no. Maybe several years ago. However, my neighbor had a Cats Meow for several years and he sent it back to them this past spring saying it wasn't keeping up to the rated temperature, so they sent him a new one, which is their latest improved model. He took the new bag, exchanged it at the local outfitter shop for a better, lightweight bag paying the difference.

I would at least call TNF and see what they can do. It couldn't hurt.