My 9 month old Buff Orp is in distress. She seems to be choking, but I'm not sure if that's what it is. She is breathing rapidly, and wheezing. The wheezing is like a distress call vocalization. She sounds hoarse. Its a kind of honking sound. She sneezes sometimes, and shakes her head. We have looked down her throat, and we don't see an obstruction. We have isolated her in a dog crate. She has water, and wet food. This came on suddenly. She was fine an hour ago. A few times her comb has gone purple. She is up and walking around right now. She will eat and drink. But is obviously in serious distress. Any suggestions?