Prelude- this is an approximately 10 month old Black Copper Marans pullet. First noticed her acting "off" a week ago but didn't pick her up for examination until yesterday and immediately brought her in the house. Does this look like frostbite to anyone with frostbite experience? At first I thought bumblefoot, but there is no core or scab. There is a small bubble of skin between two toes that at first I thought was an injury that maybe had left her foot vulnerable to infection. But it has been unusually cold here (single digit F with wind chills in the negative) and she is at the bottom of the pecking order.... so frostbite is a distinct possibility except it only affected one foot? Her foot as you can see is very swollen and tender. When I first noticed she was walking funny and looked at her feet they were so swollen there was blood oozing out between her scales. I feel awful but we all know how well chickens hide illness or injury, plus her heavy foot feathering hid the swelling. There are no blackened or white spots as I would expect with frostbite. She barely walks and only eats and drinks with encouragement. I've brought her into the house and have been doing epsom salt soaks, Vetericyn spray, triple antibiotic cream, and betadine on the bandaging. Also tetracycline in her water because that's all I have onhand but have ordered some Amoxicillin online that should be here Saturday. Pen G has also been a suggested treatment but I've heard others including vets and experts say the "caine" ingredient can be harmful or fatal to chickens. This photo is pre-soak yesterday. She loved her spa day and drank several Tablespoons of medicine water after the soak started to relax her. Here you can kind of see the wound or blister between two toes (the two I'm holding apart). That and the weather are the only factors pointing me to frostbite. I am unsure what to do beyond soaks, bandaging and antibiotics. If it is bumblefoot, will a core eventually form? If it is frostbite I should start to see blackened spots within a few days? I've dealt with frostbitten combs but never had frostbite on the feet. If it is infection I hope these antibiotics take care of it. Poor girl, you can tell it really hurts. She did take a few nibbles of scrambled egg this afternoon and again tonight. Ate one mealworm beetle but wouldn't touch any worms. She will eat and drink if she is "soaking" or if I support her body up to the food and water.