Hi there, welcome
I’m guessing his pellets are still too rich, or he’s still getting too many.
He should have unlimited hay. Unfortunately your breeder gave you poor info, because hay is the most important part of a bun’s diet! This is pretty common unfortunately… they have different goals for their rabbits…. I’m also guessing the breeder used a alfalfa based feed meant for lactating does and babies.
At his age, he should be slowly transitioned to a timothy based pellet, and should only be getting a small amount per day. My 9 lb girl only gets about 1/4 cup per day total, so it would prob be about a 2 tablespoons for a holland lop.
For now, I would start giving him more hay, and start reducing his current pellets. You could honestly prob cut them out entirely if he is a good hay eater and see if that helps things (I bet it would). You could also cut out the carrot (unless you mean just the green parts? those are great for buns
).
When you introduce the new pellet, start with just a teaspoon of the new and see how he does. Then gradually replace the old with the new over the space of a couple weeks.
Once you get his cecotropes under control, you can think about slowly introducing some more leafy greens into his diet, there’s lots of good info under the Bunny Info tab at the top of the page in the diet section.
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The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.