I gave my dog Ace a bath yesterday and noticed a sore around is left shoulder blade about the size of a dollar coin. I few days later i noticed the same area was dark. I went to check it out and found that his hair was rock hard from what seems to be pus. I cleaned out the area which is red and oozing pus. He has all his hair in that area.
I cleaned out the sore with distiled water and put a little bit of iodine.
I just wanted to know what could it be and what i could do.
Sounds like a hot spot (pyoderma). Derby is just getting over one. Clip the hair off the sore and around the area. Clean up the sore. Then get some Gold Bond Medicated Powder and apply. You need to keep him from wanting to scratch at it.
I've posted this before, and will post again. The best solution I've had in dealing with these is first, trim all the hair away from it so that it can get air. Then use a cotton ball soaked in Hydrogen Peroxide and scrub the hotspot once or twice a day. This will dry it up in no time and allow it to heal.
I used to fight these all the time on Ruger, had many treatments from the vet that took forever to work, or didn't work and I'd have to take him back. I finally just tried the peroxide and had wonderful results.