Hi. I have 15 chickens that free range (altho the pickings are pretty scare going into winter here). I also feed four penned heritage turkeys. I am going through a 25kg bag of lay pellets per week. Is this enough, not enough, too much. They are always hungry or so it seems and there is never any food in their feeders when I go out mid day or in the evening. Would a natural wormer be a good thing? Thanks.