@mnemonicoverload Absolutely remove them from their reach! They are gnawers, and will go through a 240v lead and conductor in one effortless nip. I've seen one do what I thought was a quick driveby sniff of an ADB mouse cord, and it was snipped clean through without me seeing it happening and I was looking straight at it!
I've heard people say corrugated cable ducting works, but it has to be larger than a certain diameter.