★★★★★
I completely rid six cats of giardia with a paste made of ground pumpkin seeds and aged garlic extract. Grind pumpkin seeds in a coffee grinder or processor then take about 1/4 tsp and add a couple of drops to the garlic extra. The extract is aged garlic and will not cause the same problems fresh garlic will. It's perfectly safe. I've never had any issues with any of my cats and I've used it fairly often for medicinal purposes.