At the shelter I volunteer at they always have air horns handy in case when there are dog to dog intros they go badly. I bought one because there are times when casey attacks bubba, no bloodshed but it is scary and I am afraid I will get bit breaking it up.

You can buy one at a sporting goods store and keep it handy, lets face it you cannot separate them 24/7. I hope this was a one time incident, I definetely agree with the feeding separate idea.

Edit to add, I am so sorry about your leg, sorry but it looks just gross