There is a product called Bitter Apple Cream that is used to stop pets from chewing on furniture. It can be used on the weather seal as well. Some customers tell us it doesn’t work for them.
We have had several customers email us and tell us that cayenne pepper brushed on the weather seal with a damp towel seems to do the trick. You have to reapply it every couple of days. Eventually the puppies will stop chewing on the weather seal and then you can stop.