It is extremely difficult to provide information on healthy weight online. There are weight estimations based on breed, we never really know what combo of breeds are in our rabbits that will make them stray/adhere to those estimates. Also, 4mo is really in the prime of growing, so it’s hard to tell.

Here is a diagram that can be helpful for a general idea, but the best assessment will come from a rabbit vet who can handle the rabbit and balance their expertise to know how your rabbit is:

… I think generally speaking, if you received your rabbit at a healthy weight and have provided an age-appropriate diet and exercise, he/she should be maintaining a healthy weight relative to his/her age, unless there are underlying medical issues.

At this point, your rabbit should be eating lots of hay (unlimited) and some pellets, based on weight. Alfalfa hay and/or alfalfa pellets are fine since the rabbit is growing and needs that extra nutrients to grow.

Keep in mind that young rabbits tend to be a bit on the lean side. They fill out once they are done growing size-wise. Wick provided an excellent diagram. I agree though. As long as your bunny is receiving an age-appropriate diet, you shouldn’t have to worry.

Yes, unlimited pellets are fine when they are growing. Unlimited within reason though, of course. She needs to eat hay too.

Are you sure she’s a dwarf? 1kg sounds on the large side for a 4 month old dwarf, so I’m wondering if it’s another small breed or maybe a false dwarf. Don’t limit her food too much based on dwarf standards if she’s truly a full kg in weight. If you’re just rounding up then maybe she is. Like said above, pellets and hay since shecs still growing and it’s easy enough to adjust when she grows up.

Yes that sounds like the right weight for a Dutch but that’s definitely bigger than a dwarf. Dwarf rabbits are usually going to be less than 1kg full grown so keep in mind that if you were reading about the amount of food needed for a dwarf she’ll probably need more than that.

When they were babies I didn’t, but I gave them a LOT more than they get now as adults plus of course hay and salads once they were old enough. Since she’s only 4 months it shouldn’t hurt her to have a bowl of pellets out for a couple more months, then you can reassess what whether she needs to start cutting back and eat more hay.

I think it would also be beneficial to start introducing veggies to her at this point. Of course do this very slowly as you don’t want to upset her stomach. Start by maybe giving her a 1/4 of a romaine leaf and then see how her stomach reacts. Watch her poop and if it’s a lot different then give her a smaller piece. Make sure you take you time and don’t rush anything. Oh also start with veggies that are basic and easy on rabbits stomachs.

What kind of hay is she eating? Grass hay (timothy, orchard, etc.), or alfalfa?

If it’s just the occasional softer poop I wouldn’t worry too much, as long as her hay consumption is good. It’s likely because of the higher protein content of her pellets, plus young bunnies are still developing their gut flora. If she starts having lots of soft ones then it would be good to talk to a vet about it.