Amount depends on age and size of bunny – any pellets I’ve ever bought give the recommended amount based on the weight of the the bunny somewhere on the bag. With my two lops, I always split it into two portions, breakfast and supper. Recently, I adopted two underweight little girls, and they get a few extra pellets during the day, until they get to a better weight. New veg need introducing carefully, and not too much of anything high in sugar. Generally, lots of leafy greens are good, but I’ve had to slightly cut back on the girls greens, as they love their greens, and were eating lots, and so weren’t gaining any weight. Any changes to a bunny’s diet needs to be done in very small steps, so as not to upset their tums. Most of any buns diet should be hay, and the aim is to maintain a healthy weight.
I’ve been using feeding times to gain the girls trust, and when I’m bringing them food, I give a special whistle, so they get used to coming to me. We’ve had one nearly three months and the other just over a month, and both know exactly what that whistle means and come running. If I have the time, I like to hold some of the extra pellets during the day in my hand, and both girls are happy to eat them from one hand, while I rub the top of their noses and behind their ears, with my other hand, so they get to associate me, and me touching them, with the positive experience of food.