I worm similar to daleh, but be VERY careful w/ Ivermectin (Ivomec). It can and will cause liver damage if given to much and I've seen quite a few dogs die from it. The rule of thumb for Ivomec is 1/10 cc for every 10 lbs. of dog. I have over a dozen beagles and a few yellow/black labs and for a 22 lb. beagle, I give 0.22 cc. Hope this helps. Ivo is mainly used for heartworms and you need a heartworm test prior to giving. If your dog has them, Ivo can cause them to dislodge in the heart and lungs and kill the dog. Ivo is a no no for collies and herding dogs.

I use Canine Allwormer every 3 months, and Safeguard liquid every 2 mo. alternating between the last 2. I also use Nemex 2 & Dworm for puppies and pregnant females. If you have any questions or doubts, just ask, it's MUCH better to be safe than sorry and I've been doing this a long time.