I have two laying hens who are on laying feed. Do I need to change their diet in the winter when they quit laying? Also my indian runner duck lives with my hens (thinks he's a chicken) and he just eats what they eat. Is that okay? I don't know how to seperate their feed if I need to feed him different. Also I've heard duck pellets mentioned. Anyone know where to get them. My local feed store thinks I'm crazy. And grit. Will the grit I use for my cockatiel work or does it need to be bigger. And should I just mix it in with their food? In the summer I don't give any because they are free range but now we have 9" of base snow. Thanks