What quantities of food should I feed babies and “teenagers”?

Birth to 3 weeks–mother’s milk
3 to 4 weeks–mother’s milk, nibbles of alfalfa and pellets
4 to 7 weeks–mother’s milk, access to alfalfa and pellets
7 weeks to 7 months–unlimited pellets, unlimited hay (plus see 12 weeks below)
12 weeks–introduce vegetables (one at a time, quantities under 14g)

What quantities of food should I feed mature adults? (1 to 5 years)

Unlimited timothy, grass hay, oat hay
32g to 64g pellets per 2.7kg body weight (depending on metabolism and/or proportionate to veggies)
Minimum 250g chopped vegetables per 2,7kg body weight; always introduce vegetables and greens slowly to make sure your rabbit can tolerate fruit daily ration no more than 2 Tbs per 2,7kg body weight.

What quantities of food should I feed senior rabbits? (Over 6 years)

If sufficient weight is maintained, continue adult diet

Frail, older rabbits may need unrestricted pellets to keep weight up. Alfalfa can be given to underweight rabbits, only if calcium levels are normal. Annual blood workups are highly recommended for geriatric rabbits.

If I feed fewer pellets, how do I compensate?

When you feed a lower quantity (or no) of pellets, you must replace the nutritional value without the calories, which is done by increasing the vegetables. Also, a variety of hay must be encouraged all day long, we do this by offering fresh hay a couple of times a day.

Primary Author(s): Marinell Harriman
Sources: HRH, various articles from the HRJ, RHN
https://rabbit.org/faq-diet/