reminds me of what i experienced years ago.
i was trying to promote the upgrade of neoprene, hypalon insulated ignition cables to silicone-insulated ones for industrial, natural gas engines in the high plains. engines were driving irrigation pumps.
program started out OK, then faltered. went out to west texas to find out why. farmers told me. seems that cattle, which had access to the engines, had some desire to eat the silicone insulation on the cables. wouldn't have believed it if i hadn't seen it.
engines were ignited with low-tension magnetos. boy did the cows make some funny moves when they got bit. unfortunately, the engine almost always went down when this occurred. and this drove the farmers crazy.
must be something in the chemistry of the polymeric materials that the critters crave.