It is important to know that your grandmother is not on any food restrictions (diabetic diet or low salt). Also, you should check with her doctor to make sure there are no restrictions on the types of food she eats that may have adverse effects with any of her meds or may exacerbate any health problems (heart disease, gallbladder, ulcers, etc.).
There are 2 more commonly used appetite stimulants that I know of Megace and Marinol. You might ask her doctor if he feels that either would help her.
Many elderly people lose their taste for most foods. It's common for elderly people to want sweet things to eat. Even though it sounds gross to younger people, I have seen sugar, sugar substitute, honey, and/or jelly added to everything on the plate---and it works for people who would rather have something sweet to eat.
There's also a supplement called Benecalorie, which can be added to food for extra calories. You may be able to get the doc to write a prescription and have her insurance to cover it due to the high cost.
Check out these 2 sites: http://www.nestlenutritionstore.com/cancer-itemdetail.asp?T1=BENECAL+24CU&cid=gglbrbenecal&gclid=CJW29ZWB2pUCFRJxxwod5mdVYA
http://www.walgreens.com/store/product.jsp?CATID=100673&id=prod386331
If she has dementia/Alzheimer's, she may not feel hungry or think she has already ate. Sometimes just putting a plate of food in front of her and joining her to eat will signal her mind that it is time to eat.
I have had dementia/Alzheimer's patients tell me "I'm not hungry" or say "That's all I want" but then they will eat more if you just leave the plate there a little while longer.
Does it take her a long time to chew or does she have dentures and her gums are sore? Sometimes eating can be energy consuming and 'wear out' an elderly person (especially if they have trouble breathing or have Parkinson's disease). If she has lost a good bit of weight, her dentures (if she has them) probably don't fit her as well and cause pain or discomfort when eating. You could help the above by giving her softer and/or blended foods (baby food, applesauce, pudding, cut her meat into very small pieces, steamed veggies, baked potato, etc.). If she has trouble feeding herself, you may need to feed her or at least feed her some more bites after she has tried to feed herself.
If she prefers to drink more than eat, make milkshakes and even adding ice cream to her Boost Plus will help.
***From: http://weightgain.lifetips.com/
***Calorie Supplements in Everyday Recipes
Some unusual ways to create calorie supplements and protein to your everyday meals: Add powdered milk (2 to 4 tablespoons) to a cup of milk, or mix powdered milk into puddings, soup, vegetables, pancake batter, milkshakes and potatoes. Powdered milk contains 33 calories per tablespoon and 3 grams of protein per tablespoon. You can also add eggs or egg substitute to recipes like meat loaf, mashed potatoes, macaroni and cheese, chicken salads and casseroles. You can also add extra eggs to pancake batter and French toast. Eggs have 80 calories each and 7 grams of protein. There are always innovative ways to add calories to help in gaining weight.
***High Calorie Snack Ideas
High calorie snacks are recommended to help in gaining weight. Some great high calorie snacks include toast with cheese, peanut butter and jelly sandwiches, a bagel with cream cheese, 2 slices of pizza, an egg and cheese sandwich on an English muffin, smoothies, nachos with cheese and beans, a trail mix of nuts and fruits (don't be afraid to throw in some chocolate) and buttered popcorn.
***High Calorie Foods
High calorie foods that help weight gain: canned fruit in syrup, custards , pudding, cheesecake, ice cream, milk shakes, buttermilk pancakes, Bar-B-Q ribs, peanut butter, potato salad, macaroni salad, bacon, baked beans, cream cheese, raisin toast with jam, tuna salad ham and eggs, cream pies, baked potato with the works.
Good Luck to you and your grandmother! You deserve a big pat on the back for all that you do for her!!!
(Sorry so long....but I want to help as much as I can)