You can get synanthic from the vet or order it from Jeffers. The dosage is 1cc/55lb dog and it'll knock out dang near every worm in the book besides heartworms. I've been using it for awhile and I'm real happy with it.
Spanky I use the Strongid till about 4 weeks old. Then take about 5 cc of ivermectin and squirt in about 50 cc of strongid and shake well.I then give mixture at a rate of 1cc/5 pounds. I told an old vet what I was doing and he said you are doing just right as he does the same thing. I have never used the Synanthic how would you give it?