We use the liquid wormer for cats (piperazine)...i weigh them with me on the scale then dose as it says for the cats. I've mixed it with yogurt or smooshed banana to get them to eat it. Supposedly it tastes sweet. I know it works because if they have them you'll see them in the droppings a day after you give it. I do them all on one day in the fall and the spring as soon as it gets warm. I have only done it with adults/ almost a yr when they get it the first time. I don't think it gets every kind in the world, but It's handled it well for me.
