I bought Missing Link for the cats. Except I'm not sure how to give it to them. I have four cats, 2 of them are kittens. I free feed the dry and wet food. The wet food hardly gets eaten. I have two things of dry food out, one of them is in a bowl in one room and the other is in one of those food dispensers so they dont run out. How do I give them the missing link in the food? I dont want the kittens to get more then they should, and in the self feeder how do i put it in there and how do i know how much?Thanks