[sweetpotatoe]

My yorkie, Cricket, is 10.5 months old. He's a great dog.

But last week out of the blue, he threw up what looked like yellow bile-ish stuff and a few blades of grass. I figured that he ate grass that didn't agree with him and forgot about it.

But last night at 5:00 a.m., he suddenly threw up again. This time it was reddish brown, so it was probably his food.

Is this normal? Do your dogs just throw up sometimes? He hasn't thrown up before unless he ran too much just after eating, but that doesn't apply to either of these times.

Is he sick? Help!