Dry Heaves More Condition_symptoms My Dog Dry Heaves A Lot & Every Once In Awhile Will Throw Up A Clear To Yellow Colored Mucus What Could It Be?

My dog dry heaves a lot & every once in awhile will throw up a clear to yellow colored mucus what could it be? - dry heaves more condition_symptoms

It is one years old and loves to chew everything. He eats well, and there is nothing unusual. But for the last 2 weeks, arcades, and every once in a while a clear mucus or yellowish color comes on the market. What could this be and should I worry?