Wow, I am surprised the vet gave him those shots together. My vet gives the rabies shot separately. My little one is 5mths. old and weighs 1.8lbs. The vet is going to hold off the rabies shot til she hits 2lbs. I would say your baby is pretty sore. I hate it when my babies get there shots. You hate to see them in pain
Hope your baby gets to feeling better.