My 10 y/o female mutt (probably a lab mix), named Nevada was bitten by what we believe to be a black widow spider a few days ago. We first saw a small lump on her cheek that was about the size of a marble. My dad thought it was a simple bug bite. Within 48 hours it developed into a large abscess and we took her to the vet. The abscess was removed and a drain inserted into the sutured wound. She is now on a regimen of antibiotics and pain medications. Now some background, we are Nevada's third home and we have had her for several years now. We got her from a rescue organization and it is believed that she was abused in one of those former homes. She has some aggression issues, especially toward strangers, women, other dogs and the smell of cigarettes. We keep her in the back yard and prevent her from interacting with strangers. We did not know about this until AFTER we adopted her when she began to exhibit these signs. She was very calm and kind at the rescue event, but when she established her territory at home this nature emerged. She has had only few incidents with us where she has bitten or snapped when she gets angry or uncomfortable. Ninety-nine percent of the time she is an absolute sweetheart, but the rest of the time caution is necessary. My parents are not interested in having her trained because of money issues. She did display aggression at the vet on the day of her surgery, but the vet figures it mostly was from pain and fear. Today during her checkup she was pretty well behaved except when my dad tried to put a muzzle on her. The vet has decided to let the tube fall out naturally since the dead tissue on top of the wound is falling off. He recommends we put diluted betadine on the wound to keep it clean. My question is: How can I reduce the chances of my dog biting me when I put betadine on her? She seems pretty trusting of me around the wound and even allows it to brush against me sometimes. However, I do worry about getting bitten if I do anything with the wound. Does anybody have any experience or tips in dealing with situations like this? And does betadine burn when you put it on? I am going to dilute it in warm water per vet's orders. I will post some pics as soon as possible.