There is a distinct smell that comes with butchering. That is normal. However, like others have said, without further info, we can't tell if what she experienced was likely normal or not.
I skin my birds all the time. You have to be really careful not to nick anything when taking the guts out and clearing out abdominal cavity and dealing with neck, crop, etc. Rinse, rinse, rinse with water at all stages of the process. Also, you can get "chain mail" gloves like food service folks who slice meat use - this will prevent you from cutting yourself when you wear them when butchering, at least on your non-knife hand.
If your sister has pictures of the process, of what things looked like inside as she was doing the processing, and you post them, we can help tell her if everything looked normal.
Next time you have a question about butchering, you might try posting on the Meat Bird Forum. Your title warns folks about what they might see, so it's good for now, IMO. But if you need to post pictures of bird innards or discuss the process in detail, folks on the Meat Bird Forum are expecting that, and not surprised or upset by these things. Folks keep chickens for many different reasons, and we welcome all types of chicken keepers on here. For those whose chickens are solely pets, it can be upsetting to read about others processing and eating them. Having a dedicated Forum for Meat Bird issues helps everyone get what they need out of this site without accidental trauma/drama.