Chickens attacked by raccoon

Long story short had a chicken get into our fenced in coop for the first time in 5 years. 2 chickens were killed 2 got pretty beat up. Ive separated the 2 chickens into my garage and gave them some hear. gave them some antibiotics orally, cleaned their wounds with chlorhexidine and sprayed heal excel on their wounds. Ive been given them Nutri drench every 2 hours.l or so. They both lost eyes, the blonde one has some neck wounds and some near her vent. The barred rock mostly just neck wounds. Other than going to a vet and spending $500 for them to be seen any advice on how to potentially save them? My son is pretty attached so want to try and do all i can other than spending a ton of money. Appreciate all the info or help. Looks like if i post the pics my post will be removed so not going to post so i can hopefully get some advice