RE: High-calorie snacks?
One easy way to add calories is to add fats like butter to veggies and mayo to sandwiches, etc. As adults we are so used to avoiding fats, but its great for kids. Other than that, I would try hard not to stress about it too much. Sarah only gained 4 pounds between her 18 month and 2 year appointments, which was right on track with her growth curve. Their growth slows down SO MUCH in the second year. I'm sure as soon her reflux gets under control, she'll feel much more like eating!
Good luck!
Beth, mom to older DD (8/01) and younger DD (10/06) and always missing Leah (4/22 - 5/1/05)