Almost all of the above
Well, I must say I have been bitten by quite a few different animals---6 foot nile monitor,15 foot burmese,horse,cockatoo, scorpion,dragon fly nymph(bad),dog,cat,rodents,various insects, cornsnake. I would rank them in that order. I'm sure I left out something very painfull that my memory has blocked. Note that the cornsnake is at the bottom of the list. Susan, I'm with you on the rodent thing-they seem to be my most frequent bite. I must say your one up on me--Never been bitten in the ars by a toddler. I'll bet that hurts, not to mention the embarrasment!
Matt L.