There is a chance our dog got a hold of a Cuban tree frog that was in the yard. Tonight he was sleeping and it looked like he was dreaming, but would not wake up from it. When he did he was drooling excessively and started to growl if we went near him. Within about 5-10 minutes he is doing better and not growling and the drooling has stopped. Could this be a reaction to eating the tree frog?