I decided to give into my paranoia and went home at lunchtime to check up on Ninja. I picked up some antiseptic on the way home, sponged down her wound, degunked her eyes (the collar on her neck prevents her from cleaning herself and keeps her ears pushed up near her eyes, causing irritation) and gave her a bit of a wash. The end result are some new cuts and scratches along my arms but she seems a lot better, especially with the heating on, keeping her warm. The downside is that she is a dirty dirty rabbit since she can't clean herself properly so tonight I have to spend about an hour grooming her, brushing her fur and generally doing all the things she can't do for herself.
I'm never having kids. Or to be more accurate, I'm never having kids and then getting them neutered.