I am a bit distressed as I saw this morning that my male Carl had blood in his cage and on the wheel. He was behaving normally and let me take him out without problems. I checked his mouth, paws, genitals and everywhere else but I cannot see any injuries. I also chekced teh cage for any sharp items or splinters from teh sawdust but again I did not find anything. He was happily eating his food and running in his wheel again and not limping or anything but I am still concerned. Has anyone had this before? I noticed that sometimes in the sawdust there are big splinters and I usually catch them when putting in new sawdust but I am now thinking I may have missed a small one. But in regards to his wound, do they heal that quickly? I last saw him in the cage at midnight and noticed teh blood at 7 am this morning. Any one any ideas/advice? If I find more blood after work I ll go to the vets but as I am in work now I thought I ask around here first as I am confused and a little upset.