A. Eating poop is really bad obviously and that is probably what is causing him the vomiting. it can even cause serious infections sometimes. the sneezing noise is not related to the poop but might be because he has something stuck in his nasal cavity.
Withhold food for 8 hours then offer him boiled boneless chicken and rice every 6 hours in small portions. if he is eating and not vomiting, continue with this diet for 2 days.
After 2 days, you can put him back gradually on his normal food.
If he continues vomiting or is not eating, take him to the vet to get treatment.
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