Thanks for the information. It is still possible that slight reaction meant he had abdominal discomfort. The concern with mushrooms is potential liver toxicity, so that would be a concern right now if he ate any of it. I would also be concerned that it is something else he ate, especially something that may be causing an obstruction. I am not sure when the last time he had a fecal exam, but intestinal parasites can also be a problem in young puppies. If he has had 2 sets of vaccines, parvo
would be less likely but still need to keep it in the back of your mind. If he hasn't vomited or had diarrhea, you can try some boneless, skinless, cooked chicken
breast and rice to see if he will eat that. If he doesn't eat it, or if he has some vomiting and/or diarrhea; I would get him seen by your vet right away. For a puppy who is very active to just stop playing and eating, you have to be concerned that something more serious may be going on than just an upset stomach
. Please let me know if you have any other questions or concerns. Hope this helps. My goal is to make sure that you get all your question answered and all the information you need. If you are satisfied with my answer, PLEASE RATE IT. Rating it is the only way I get credit for helping you. If you feel like it is not helpful to you, or if there is more information you need, please respond back to me before rating. Realize that our conversation is not intended to diagnose or treat a condition. There has to be a valid veterinary-client-patient relationship established with an exam, according to law. You should always follow up with your vet.