I live in New England and its fall (although there’s a lot of snow on the ground), but I noticed some tiny flies that appear to be fruit flies (they have red eyes usually and black/brownish bodies). I clean my rabbit’s litterbox every other day, and so far there has been no issues on her skin or with her general health, but I’m still really worried about the possibility of flystrike 
They don’t really seem to be that interested in her litter, but I haven’t been observing them 24/7 so I’m not sure. I checked the room for food or rotting things but I couldn’t find anything? My dad bought hay that had tiny chunks of dried sweet potato (which I tried picking out because I know rabbits should not have sweet potato), could the sweet potato chunks have attracted the flies?
I left my window cracked open so hopefully the cold will get them to leave the room (can the cold kill fruit flies?)
Can fruit flies harm rabbits? Is it possible that these aren’t fruit flies? And do you guys have any methods of getting rid of them? I tried looking online for more information but I mostly found articles on flystrike symptoms and botflies
Thanks for your advice as always!!