I have tried nylon, polyester - all kinds of thread only to have my big chewer (Slick) demolish my stitches! I have finally found a type of thread he does not seem to be able to get through, upholstery thread!
For items that take a lot of abuse, I use dental floss.
Also, if my stockings get a run, I use a strand of my hair as thread because it matches my stockings and is readily accessible.
