Another Shake or Not
Either way is fine. I'd probably have a shake if I was hungry and really needed something, otherwise skip it. I don't think one shake will make a huge difference either way.
Please note: I AM NOT A DOCTOR. If you want medical advice, talk to your doctor. Whatever I post, there is probably some surgeon or other health care provider somewhere that disagrees with me. If you want to know what your surgeon thinks, then ask him or her. Check out my blog.