Grit is definitely available at your farm supply, i just toss it down it our girls run so they can peck away when they need it. My birds cannot free range here either to many air predators would take them, so i provide various types of branches and stumps for them, i also found they love pumpkin and will clean one down like you wouldn't believe... i also toss scratch around and BOSS for hunting practice lol
If they are molting some birds can look quite poorly if conditions were not decent in there last home being a rescue you may need to wait and see what they look like after they have molted off that lack of past care.
If they are molting some birds can look quite poorly if conditions were not decent in there last home being a rescue you may need to wait and see what they look like after they have molted off that lack of past care.