Just checked with someone better connected than myself, Gino was already on anti-biotics, vet was coming in as leg had blown up (swollen) so was going to give him an injection (Dex) to bring down the swelling, he checked and found the infection had spread, they get heat in the area when sore/lame so can be hard to notice an infection, even more so when they're already on anti biotics as you assume thats taking care of things.
If I hear anymore I'll let you know, as it stands they're all a bit sick about it but it can ahppen,even though it shouldn't.
Best wishes.