Injuries happen, take a deep breath first. Okay now, clean it up and disinfect. If it doesn’t start to bleed or ooze during this process then thats all you need to do, other then keep a close eye to ensure it continues to heal properly.
However, If it does either of those (bleed or ooze), I would consider isolating to keep an eye out for infection and to be able to keep it clean. If you can’t isolate then you will want to clean it regularly until it’s closed up.
This would be my plan of action, someone with more experience and knowledge will hopefully chime in.