Gas leak issue

[On-The-Road]

Our 07 Damon Daybreak is plagued with gas leak issues. Mice have chewed through the lines twice in the past two years despite every effort to keep them away from the coach. (I've tried everything!)
Today, the leak happens back near the gas tank when the ignition key is turned on, but not started. Any ideas for trouble-shooting this problem?
Thanks in advance.

[pneumatics]

Oh... depending on chassis manf. the key to on starts the fuel pump which is in the tank. So the line from your main tank to the engine is shot.... there is typically a rubber hose from the top of the tank to a hard pipe and this allows you to drop the tank as the pump is only assessable from the top of the tank.

[lwmcguire]

Having tried everything, does that include herbal packs and the ag products? Those are the only ones I have ever found to be effective. If you haven't tried them give it a go.

Pack rats have been my worst problem over the years and hardly anything but lots of light seems effective against them. Perhaps a couple of big kitties would make a difference.