If Binky is a rescue and was previously in a foster home prior to moving in with you, you may want to check with his foster family to see if the size and amount of his poops are “normal” for him. If Binky came from a breeder, he was probably raised together with other members of his litter, so it may not be possible for the breeder to isolate Binky’s pooping habits.
Do you know how long ago Binky was weaned? It might be that his GI tract is still “adjusting” to eating hay. Although a very young rabbit such as Binky can certainly eat alfalfa hay, you may want to try a coarser hay, such as oat (sold in mini-bales in the BinkyBunny store, and in small bags by Oxbow). I have never had a long-term or foster rabbit, young or mature, who didn’t like oat hay! It’s not good for oat to be a long-term regular hay because it tends to cause weight gain, but it should be fine for a very young rabbit. Once a rabbit is 6+ months old, oat hay should probably be a weekly treat at most.
Binky is going to need a baseline vet visit prior to being neutered, so I would check with your vet clinic and (provided that they agree and are aware of your poop concerns) schedule an appointment now. It could be that his poop is “normal” for him, at least at this stage in his life, but you’ll want to be sure.