The choice to go to a hospital is the right one, but you must find a good one. This doctor initially pulled my dog back from the death line, the price is also more fair, after all, the drugs used are very good, buy your own may be cheaper but the efficacy of the really can not be said.
Your dog's condition is very mild, surely it can be cured, as long as you don't delay on the line.
Wish your dog well.