I just switched my girls from Scratch and Peck grower feed to pelleted layer feed. I had read that pelleted feed is better for them because it avoids them only picking out the seeds they like from the feed. They won't touch the new feed. I know they had a hard time switching from chick crumbles to grower feed when they were babies. Do they just need time to adjust to the new feed or should I change it up to something else?