McD didnt have a problem.
IIRC, Micky D has their own meat production. Meaning: they own it - they operate it.
I read that a while back, so things might have changed. But for a *global* burger operation, I kinda doubt it.
I saw a story within the last couple of weeks about the McDonalds supply chain folks getting very careful about how much they shipped to which store to keep from running out.