The food quantities depend on each rabbit's weight, age and even way of living, i.e. a rabbit who has the space and predesposition for climbing, running etc. burns more calories than a more relaxed personality, so more food intake is needed. In general bigger (in size) bunnies and older ones are more mild and more relaxed than younger ones. Dwarf rabbits are more energetic than the bigger breeds. However, each bun is its own case.
Re hay (=dried grass): Unlimited quantities, 24 hrs per day.
It is important that he has access to hay constantly. You remove the hay and replace with new each day, so that the fresh smell and taste makes him want to eat more. A hay rack attached to the cage bars would keep the hay clean. A good idea is to place hay also in his litter box, so that he munches and poops at the same time.
Re: pellets. Now that he's a baby and up to the age of about 10-12 months, at least 1/3 of a cup daily, it's best if divided in 2 doses, 1 in the morning-1 in the evening (another standpoint talks about unlimited pellets for this age. you should watch your bun's eating habits and adjust quantities accordingly). After the age of abt. 1 year, it's half a cup for each 2.7 kilograms of rabbit weight.
Re: greens/veggies: You introduce veggies/greens after the age of 6 months. Again, about a full cup per day would, more or less, suit the needs of a dwarf bun. A much bigger salad is needed for non-draft breeds. There are rabbits who love greens and have no problems whatsoever in eating them, there are buns who have a "sensitive intestine" (mine is like this) and can't tolerate veggies at all or can tolerate small quantities or can tolerate some and some not. Read the article about safe/unsafe veggies.
Re: fruits: A thin slice per day, no more, because they contain sugar, which is not good for their GI system. Read the article about safe/unsafe fruit. Some are even toxic to rabbits. No seeds, no stems, no peels (generally speeking. i.e. banana peels are okay. I never give peels to my bun, though).
NO snacks, sticks, treats, yoghurt drops, nuts, seeds, dried fruit, cakes, sweets, chocolate, bread, potatos etc. Not to be given under any circumstances. In case your bun can tolerate them, they are, nevertheless, completely useless and fattening. If your bun has tummy troubles, they are detrimental to his health, can cause obesity, GI stasis and other nasty problems, which can endanger even his life and which you wouldn't like to face. This kind of stuff is sold purely for commercial purposes and is merely junk food, the equivalent of hamburgers and fries for humans (=delicious, but unhealthy!).
Re: water. It depends on the rabbit, its weight, the temperature (we would expect it to be the other way round, but rabbits drink more water during winter time rather than summer time), the kind of feed (when they eat hay, they drink more water. When they eat veggies, they may even not drink water at all, because they get hydrated by the water contained in the veggies). It would be a good idea to buy one of the bottles with an ml meter on its side, so that you can monitor which is considered as "normal" water intake for your own bunny. Provide a water bowl also, they drink more from bowl than from bottles. A heavy porcelain crock would be fine, in order to avoid spillages.
All this and much more with details is in our Library. You should take the time and read about rabbit nutrition, because a healthy diet leads to a healthy rabbit. And vise versa.
Marietta
Edited to add: about his biting you, he doesn't think you're food, he's male and this is dominance on his behalf. He's probably trying to show you who's the boss! This kind of behaviour and also, humping, spraying, being agressive etc. gets much milder after neutering.
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