Can my dog get sick from eating flies?

My 6 month old puppy threw up last night and then again today. He hasn't been anywhere to expose him to disease and his diet hasn't changed. However, he has eaten a ton of flies lately. Whenever I swat them he gobbles them up immediately. I think between yesterday and today he has eaten around 40 flies. I let him... show more My 6 month old puppy threw up last night and then again today. He hasn't been anywhere to expose him to disease and his diet hasn't changed. However, he has eaten a ton of flies lately. Whenever I swat them he gobbles them up immediately. I think between yesterday and today he has eaten around 40 flies. I let him because I thought it was funny and harmless, but now I am worried that it made him sick.
8 answers 8