A couple of hours later, our guest dog started getting sick. I thought it was poop at first, because of the color. I cleaned it up, and took him outside for a little while. He continued to throw up every few minutes - totalling about 10 times.
We were trying to figure out what in the WORLD he could have gotten into, when I suddenly remembered Matthew eating chocolate cereal. I asked him if he had fed the dog, because he knows better. He said no, but that he SPILLED some, and the dog got into it. Great. Just great. Chocolate being poisonous for dogs, and all.
The owner of the company I keep the dogs for, fortunately, lives right behind me. I went over and talked to him, and we looked at the dog. We think that he didn't get a chance to really absorb much, and his body started throwing it right up. Thus the dark brown color.
He has since stopped throwing up (hasn't for about 1 1/2 hours now), and is just laying next to me on a towel. He's alert, just feeling a bit worn out by the amount of times he was sick.
I feel HORRIBLE, and have lectured Matthew until I'm blue in the face. I'm so glad the puppy isn't hurt!!!! It scared me to death. I can't imagine how I would feel if my dog went to stay with someone and got really sick while visiting them.
I'm sure I'll sleep with him next to me tonight, to make sure he is ok and try to make up for letting this happen right under my nose.