I recently had to have my tub removed and replaced due to water damage under the floor (busted water heater). They had to cut the old tub in pieces to get it out as it was one piece for the tub and surround. They installed a new tub and then put in a vinyl surround. They did a less-than satisfactory...

I am having my home's galvanized steel pipes replaced with pex. However, I've heard from a few sources that pex is susceptible to being gnawed on by mice and other rodents, which of course will cause leaks. I'm wondering if anyone else who has pex lines has had this problem?