Trapped injured rook

Hi all, I have an injured rook in my garden it's wing is badly damaged and can't get out as my garden is all fenced in... RSPCA said to call local vets and they are not interested... I have a husky which I can't let out as he's chasing the rook round the garden... Its too big to catch myself and it keeps hiding behind my garden shed. Any advice on who to call if someone could get it and bring it back to health?