I am sorry that I am late to the party! Our go-to antibiotic when I have had turkey or chicken woes has been Exceed. It's and injectable that only has to be given once a week, but if you are going to eat an animal there is a withdrawal time. I had a tom bust one of his air sacs in his chest once, he looked absolutely ridiculous and earned the name air head. He refused to stop gulping air to puff up his chest air sac, too. We ended up lancing his head and neck, but we left the body alone because we did not want to puncture his crop and, although my mother is my primary veterinarian, her partner knows only a little more about poultry medicine than my mother. We gave him the one shot of Exceed and deflated him as necessary around the head and neck and made him comfortable from the other turkeys. His air sac eventually healed. Sometimes I have had crunchy sounds happen in turkeys that have gotten into a bad fight where one party was beaten severely enough to push air under the skin. You can bet the aggressor was dealt with as I don't want turkeys that fight so hard they cause problems, especially when the aggressor is a tom and the target a hen.