Hi everyone I have a bit of an issue with one of my five month old pups. He is vomiting about every 3 rd morning ( has the last 2 mornings tho) its first thing in the morning about 10 mins after he wakes up and he hasn't done any physical activity maybe just a walk around his room. His vomit is almost like saliva- a little yellow but no evidence of any food! He also does it 3 times, and by the 3 rd time it's such a little amount it doesn't even come out of his mouth. Also it's not just like he vomits he stands there for 30 seconds or so n I can hear his stomach going gulp gulp as the vomit is slowly coming up! Any thoughts about what migh be wrong???