Oh poor thing. It looks like her earlobe may be torn off on the left side, and there is a lot of skin and feathers missing on the right as well. I can’t see torn wattles. I would use either saline, 2% chlorhexidene (or Hibiclens 4% with water mixed in,) or Vetericyn wound spray on the wounds...
She may be in shock for the first day. It depends if she was crushed or shaken, as to how much damage was done. I would keep her in a quiet protected area in low light, such as in a covered wire dog crate with food and water near. Occasionally hold a lid of water up to her beak. Mushy chicken...