I really,
really dislike the eggcup rule I'm afraid.
Firstly, because different eggcups do not equal same amounts. Depending on different eggcups, depends on how much food they will hold. You would therefore be much better off with actual
consistent measurements, such as tablespoons etc (measured by proper measuring spoons!).
Secondly,
no two rabbits are the same, so what works for person will not necessarily work for another.
Thirdly - and possibly most importantly, the amount of food an animal needs depends entirely on the individual, it's life stage, health and activity levels and that's just the start. A young, growing rabbit needs more energy than an adult rabbit. An un-neutered rabbit needs more energy than does a neutered rabbit. A more active and playful bun needs more energy than a more laid back bun. An outdoor bun in cold weather will need more energy than an indoor bun in a warm house. A rabbit with lots of space (ie: housebun with access to several large rooms all of the time) could well need more energy than a bun who has a 6x2x2 hutch with an 8 foot run attached (at least in summer months). A young bun being fed an eggcup full of pellets a day will soon lose condition, as will an un-neutered bun.
Lastly, it entirely depends upon what brand of pellets is being fed - all similar, but not equal in terms of nutrition. A rabbit will need more of a poorer quality food to get it's nutritional needs, than a higher quality food. It also largely depends on what else is being fed. If feeding your buns a good amount of varied forage daily, you'll likely get away with an eggcup of pellets - because their nutritional needs will be largely met by the varied forage. Ditto with vegetables.
I totally understand why people recommend such small amounts of pellets - far too many pet rabbits are grossly overfed to the point they're not getting the correct diet (rabbit eating mainly pellets or muesli and not enough grass/hay/forage). However, many a time I have seen such recommendations and thought it quite dangerous, knowing full well that whilst it will work for some, it won't work for all and will cause plenty of rabbits to lose condition.
I've seen plenty recommend it without even asking the basics such as how old the bun is, whether it's neutered or not, whether it lives indoor or outdoor etc. Never mind weights, activity levels, space or what else it gets in the diet. It does concern me that it seems to be a blanket recommendation for all rabbits - of course assuming all other buns are in the same position as our own (correct diet, spayed or castrated (thus, adult!) plenty of space etc.
My Micky lost condition when I tried to reduce his food. Nothing wrong with him - he's a healthy, 8+ year old outdoor bun with constant access to grass, hay and I feed him forage (as much as I can identify, which unfortunately is not a huge amount bar brambles, cats ear, dandelions, herb robert, hawthawn and now raspberry leaves!!). He is fed a high quality pellet. He has always been an outdoor bun. In summer in England when he was younger, he needed very little pellets - in the winter I had to up them. Now as he's got older, and I live in Scotland, even in the summer months which can be surprisingly warm, he would starve to death on an eggcup of pellets a day. That being said, even he doesn't need a handful of pellets day, except perhaps in the worst of the Scottish winter.
In conclusion, I don't think this should be recommended as blanket suggestion without any prior background like I've seen. :thumb: