I have a 2.5 week old little guy that I have been working with the rehabber taking care of. She is currently unavailable and I'm pretty sure he has Pnuemonia. I've got amox and cephalexin on hand. Just need dosage he weighs 44grams he's eating and pooing normal just lethargic and I hear the clicking. I'm unable to get to a vet until morning.