We have about 30 laying hens that vary in age. Most are 2-3 years old and a few are probably 7+ years old at this point. We like all of them so even when they are old, we keep them on as a pet. Well, they have been eating crumbles all these years and we want to switch them to an organic brand that only comes in mash. But the chickens don't like it! They hardly eat it and a lot of it ends up on the ground. It's hard to justify spending a little more on their food if they don't even want to eat it! Any ideas to get them used to it and be happy about it? Thanks!