So I live in Las Vegas where it’s usually dry and hot. I’ve been wanting to set up a humidifier but I’m not sure what the affects would be if I suddenly have humid air with my guinea pigs. Would it be bad for them if I did so? And if I can introduce the humidifier could I put essential oils in it like eucalyptus or peppermint, would that be safe for them? I’ve had them 4 and 5 years so far with no humidifier, I don’t want to suddenly get them sick if I did add it.