I am 1 week post op. I am allowed to start protein shakes today. I have no problem drinking. My question is..do I limit the protein shakes to 2-4 oz like food?

I made an 8 ounce and poured myself an ounce evry 30 minutes and sipped at them til they were done. Some days harder than others

No, you don't have to limit Protein shakes like you will food. liquids go down much more easily than solids, so you can just focus on the amount of protein you need to get in. For most of us, at the point when we're just starting protein shakes post-op, the issue is trying to get enough (1) liquids and (2) protein rather than trying to limit the amount of calories.

I say take your time, stick to 30 minutes. I found Protein drinks went so very easily and didn't have a problem drinking 8 oz within 30 minutes. Experiment and see what works for you.