My dogsitter noticed a wound on my dogs side, when I got home I looked at it and cleaned it with water and put wound cream on it from the pet store. It is about the size of a quarter but is deeper than a scratch, maybe two cm deep. There was still some hair growing out of the middle of it, I trimmed it today and noticed the hair in the wound felt hard, I thought maybe the cream was still in it so I trimmed it shorter but not I’m not so sure, it looked like there might be flesh in it now and it is starting to look infected. Any ideas as to what it is and what I should do? We have no idea how he got it, he got it on Saturday and it is now Thursday. The photo is as close as I can get my camera to it, the wound is smaller than the photo makes it appear.