How do I make foods liquid for our son (18 years) whose jaw is wired shut?

Is there anyone at my hospital who you know who can help me find a way to make foods liquid enough for our son (18 years) whose jaw is wired shut due to orthognathic surgery for orthodontic treatment? High-calorie protein powdered foods are too thick even when thinned. He has lost 15 pounds already (6 feet 1 inch now 140 pounds). At 20 pounds he has been re-admitted to the hospital.

I’m sorry to hear about your son. Unfortunately even with aggressive nutrition therapy, patients I have worked with often lost 10 pounds during the 6 weeks their jaw is wired because liquefied foods are lower in calories.

Please read suggestions below and let me know how he does.