My yorkie Kagan did this most of her life she passed away a few years ago. When she did this I noticed it would help if I gave her something like bread which helps to absorb the acids in her stomach which lessoned the occurances also if she ever had loose poos I gave her a slice of bread and it really helped
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mommy of Jersey Girl d.o.b 3-20-12, & KIWI d.o.b 4-18-12
& momma to one in yorkie heaven
Kagan 12-24-06 /8-13-09 forever loved & forever missed