The birds, which have snow-white colouring and blue eyes instead of ravens' usual jet black plumage, were starving to death and showed signs of being attacked by other crows.
Sanctuary manager Sally Rowley said the fledglings, named Tic, Tac and Toe, were "skin and bone and were just sitting, not moving".
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The rare white ravens are said to be starving to death after being attacked by other crows
"They just sat in a bush and you could pick them off like an apple," she said.
It is thought the trio had been abandoned by their parents. But thanks to a diet of mince and parrot food at their new home, they look to have left their ravenous days behind them.
