I presume that my two corgis have worms of some kind (?), but not 100% sure. Whatever, I had to buy 500 ml of Valbazen for worming my chickens; that's much more than I will ever need. I Googled and learned that I could treat my dogs with it, using one ml/cc for every 10 pounds. They each weigh 30 pounds +/-. A pharmacist gave me a three ml syringe with the needle removed. Twice I put 3 ml in the syringe and shot it into a small bowl of buttermilk for each corgi. Maybe I didn't waste my money buying 500 ml/cc after all.