i have a year and one half year old pom that got up yesterday and threw up once. he has been shivering, hurts in the chest area when picked up sometimes. he is alert but keeps his tail down. he doesnt look to be in severe pain and has had all his shots. i have two other dogs and they are fine.i think one of my grandchildren may have kicked him or squezzed him too hard. i have him laying in my room alone now so i can see if he eats and what his stools look like. could he be shaking from pain or ate some small object?
I recommend a vet visit, it sounds like your pet is not feeling well. vetcare