Chopper does this on occasion. I knew that chis were prone to this, I also read it has to do sometimes with adjusting their pallet. The first time he started doing it I about freaked out because I thought he was choaking on something. I ran over to him grabbed him up and started kind of tapping on his sides and rubbing him. Needless to say after he stopped I realized what it was...now when he is going to have one, I guess he can feel it coming on, he comes running to me to hold him. You can rub their throat to make them swallow or pinch their nose closed to make them breath through their mouths, supposedly this is suppose to help. I just rub his throat and let him sit with me until it is all over. His usually only lasts for 10-30 seconds and it is over. Overly excitedness and drinking to fast and call cause it. Fun huh?