Grit will not prevent crop compaction. Grit is used in the gizzard to help grind stuff that needs grinding. The gizzard is further downstream than the crop. Grit can help minimize the risk of gizzard compaction, which can be a thing. Gizzard compaction can back up to the crop but that is not crop compaction. If they already have grit then adding more won't help.
Room, thing to perch on, things to scratch, all help. But just because they are not active do not assume they are unhappy. Just laying around taking life easy is a great pastime for them. Give them options and they will choose to do or not do what they want.
Room, thing to perch on, things to scratch, all help. But just because they are not active do not assume they are unhappy. Just laying around taking life easy is a great pastime for them. Give them options and they will choose to do or not do what they want.