So this happened to us last night. Thanks to this thread we treated the bleeding with corn starch and removed his wheel. The bleeding stopped we went to bed and he stayed in his house most of the night.
In the morning I found bloody foot prints all around the cage and a small blood soaked stain in his bed... so it started again.
I replaced his bedding and he seems to be his usual crabby self when I wake up. Other than trying to keep the wound clean with daily foot baths, I guess that’s all we can do. I want 24 hrs before I put his wheel back. All we need is him running for hours through his own bowl movements.