If your bun can eat hay and pellets she will get the nutrients she needs from that, esp if you vary the types of hay she gets. You can dry some vegetables for her if you want to give her vegetables. Kale, dandelion greens, apple leaves and other edible leaves, thin slices of carrot (carrot should be considered a treat) dry very well. I’m sure you have a lot of veggies that I’m not familiar with, but you can experiment with drying some and see if it works. Lettuce doesnt dry well, but lots of other greens do, although some needs to be sliced finely before being laid out to dry. Turn them now and then and pack in bags or jars that you can close and they’ll keep well. Make sure theyre completely dry before you store them or they will rot or get moldy.

Agreed w/ @Bam — as long as your rabbit is eating hay and good-quality rabbit pellets, nutritionally, the rabbit should be fine. Veggies also don’t contribute much w/ weight either. I would be more concerned about your rabbit’s overall level of hydration though. You mention there are not many rabbit-savvy vets in your country– do you mind sharing where you’re located? Also, how did you get the diagnosis of fur in the cheeks?

If there is big concern about weight, you simply want her eating more calories. You can try and increase pellet amount slightly (depending on her age and ideal weight). If you have access to something like Critical Care in Vietnam (I noticed it’s listed on Lazada), that can be something you provide as a supplemental diet addition for weight gain. It is nutritionally balanced, so unlike over feeding pellets, there’s less concern for nutritional imbalance. I had a rabbit gain some weight over two weeks with critical care supplemental feedings every day.

Are they 100% sure she doesnt have a molar problem? Drooling and weight loss could indicate she is having enough trouble chewing that she is losing weight. It can be hard to see the back molars without anesthesia or x-rays.

I agree that increasing pellets amounts slightly or adding critical care (or a similar product) to be sure she’s getting enough calories would be good.