I'm a newbie chicken mama (have had my 2 girls 2 weeks) and have a few questions that I hope someone can answer. What is the difference between grit and scratch? My chickens are about a year old and were given to me by a friend. They each lay an egg a day. We live in Florida and our soil is sandy. The chickens live in a coop/run my hubby built, so they have ground area to scratch around in and grass, etc. to supplement their diet of crumbles, which they were used to. Do they need grit and/or scratch? I want to keep my girls healthy. Thanks!