By the way, 30 dollars for Strongid seems really high. How much does the dog weigh again? That seems really high.
You'd think for the money they would have at least given you Drontal, that kills all worms except heartworms. Perhaps they wanted to just get the roundworms with this dose so that the dead worms don't cause intestional blockage (saw a dog die of that, too). Strongid only kills roundworms if I'm remembering my worms correctly.
They always worm dogs with coccidiosis so I should have anticipated that one for you and had you prepared to say "I already have strongid at home, what dose?"....sorry. But I would have thought they would have given you the Rx wormer, Drontal. Not any cheaper but it is what I've seen used for cocci and darn good stuff.
Personally I feel it is good to hit all your dogs with a wormer like Drontal once a year. That is why I was so surprised the goat folks didn't think worming "just because" is a good idea, because with dogs they are almost sure to have worms using a wide spectrum wormer once a year is very cost effective.