Looking for some help. My husband did some work at a brewery and brought home a barrel of spent brewery grain. Started giving to my chickens along with their layer crumble and scratch. After a few days the eggs stopped. I only gave the beer grains to them for about a week and then stopped. It has now been over a month and they still havent laid any eggs? Will they ever lay again? I know they are sensitive to changes, how long do I give them to get over the brewery grain before they go in crock pot??