For enteritis, I have use metronidazole. I think amoxicillin could be used to and it might be better in case there is a gram-negative infection since penicillin is ineffective against gram-negative bacteria.Amoxicillin has better absorption than Penicillin for most "cillin" responsive bacterias, it may work just as well on Enteritis? I've never used it for Enteritis.
But, I have some plain yogurt. How about that? Or is that counter productive right now?