The first problem — a chewed-away zipper bottom — is quite common, but requires no sewing to fix. As you’ll see in the video below, all it takes is a drinking straw, some hot glue ...

You can do this using pliers. First, remove the stitching around the lower end of the zipper with a seam ripper. Be sure to take off the metal stop at the bottom of the zipper without tearing the ...