Our hen Yuki has a big wound on her back and her tail is missing. Looks like maybe a predator grabbed her. She doesn't seem too concerned, but I need some Cephalexin, I can't find it. What would be a good substitute as an oral antibiotic for her? I also need an oral antibiotic for Onyx, another hen we have who has bumblefoot. I do not want to do surgery on her , she is old and I want to try soaking and antibiotics first. Again Cephalexin would be best, but what's a good substitute?