I was holding one of my step mom's rabbits, and i looked at his mouth while I was holding him. He had white, milky stuff all over his mouth and his nose. I took him upstairs to my step mom, but when we looked again the white was gone, and the space between his nose and mouth was just wet. He does have lots of eye boogery stuff and it clumps up in the fur around his eyes. Is this what it was? Did he throw up? Does he need to go to the vet?