I'm so sorry for your loss. :(
That said, everything likes to eat chicks... they are small, easy meals for many animals. Crows, jays, some wading birds, squirrels (yes!), rats, 'coons, 'possums, dogs, foxes, hawks, etc etc. When the little ones are little, they have the best survivability if kept sheltered.
Crows have always been my best ally against hawk predation. I would personally rather sacrifice the freedom of young chicks (by keeping them inside until larger) than make enemies with the crows, which will indirectly help protect my hens for the rest of their lives once they are mature. That's just my experience, though.