How is he doing?
Can you post some photos of the wounds/broken tail feathers?
Hard to say, but from your description, he may have some broken blood feathers that will bleed or continue to bleed if bumped - those may need to be pulled out with pliers (photos are always helpful).
Saline can be used to flush wounds, if you have nothing to flush with, since it's the tail, you can always use warm soapy water for cleaning, rinse generously with plain warm water. Hibiclens (Chlorhexidine) or Betadine can be found at drugs stores or
Walmart.
Plain triple antibiotic ointment can be used on wounds too.
Depending on the damage, you may need to keep him separated until he heals fully. Blood is attractive to chickens, if a blood feather was bleeding, it may have caused the frenzy, but hens remember things too

So putting him back too early, they likely will pick and investigate - roosters are known to let them too.
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