Recent I was dusting off a lightly used Dell R720 for a client when to my horror I discovered a home for a mouse. This teaches me two things. One don’t leave a server in a storeroom. Two don’t ever take a card out and not replace the slot. This rodent squeezed his way in the hole left by the PCI slot and also chewed on some of the foam in the server all while making a nice nest over by a CPU.