If you are switching feeds to improve the health of your flock, you will need to have a little more patience than you would when just introducing a new snack or food group.
We do not recommend a rapid, sudden "cold turkey" switch. Instead, you’ll want to introduce your new feed gradually, increasing the amount of new feed while decreasing the amount of your former feed.
*The key is to do it slowly for the most success, for both your chickens’ digestive health, and for their acceptance of the new food.
When switching to Grubbly Layer Feed, gradually introduce the feed.
Chicken expert Anne of @realhensofoc and author of The Beginner’s Guide to Raising Backyard Chickens: How to Raise a Happy Backyard Flock recommends the following schedule when switching feeds.
Days 1-3: 90% former feed, 10% new feed
Days 4-6: 75% former feed, 25% new feed
Days 7-9: 50% former feed, 50% new feed
Days 10-12: 25% former feed, 75% new feed
Days 13-14: 10% former feed, 90% new feed
Going forward after Day 14: 100% new feed