There is hope on a liquid diet!
I saw my surgeon today- 2 1/2 weeks post-op. He asked about my protein and I admitted I'm getting very little. I have grown to hate the protein shakes and, as if that weren't bad enough, they have started making me gassy and bloated. I have lived on thin liquids (water, tea)... He explained that it's better to get the protein than not so he gave me the okay to blend soups high in protein with equal amounts of broth to thin them out and drink those (well, can't really drink them but get down about 1/4 cup so that's better than nothing).
Thought I'd share what I've tried so far, as it's been my saving grace!
1) 1 can of Hormel White Chicken Chili (2 g fat and 19 g protein per serving!) blended with 1 cup of chicken broth
2) Sauteed 1/2 cup spinach, 3 cherry tomatoes, 1 T. bacon pieces w/ 1/2 T. butter and garlic powder, 1/2 cup rotisserie chicken well blended w/ 1 cup of chicken broth.
Since you most likely will only be able to eat a small amount at a time, one of these will last you a few "meals". May not be everyone's cup of tea, but I found them to be delicious after weeks of gaggingly sweet drinks!