Cut on rib cage

I like to use a scalpal,clean and sanitary.make your incision at least an inch long running up and down and make it closer to the bottom of the swelling. Depending on the size of the dog u can give 3cc to 5cc for 3 or 4 days. give it in the muscle not under the skin and put it in slowly then massage it in for 5 seconds. I like to give it in the thigh up high. Once you get your incision made in the swollen lump,see what comes out,if its just blood and clear fluid and blood its just edema from trauma and will heal just fine with some hydrotherapy,if its green or puss filled,flush it out as best u can then squirt about 3cc of penicilin directly up in there without the needle on the syringe.