My Holland Lop is a bit more than 4 lbs. and I give him about 1/3 cup, maybe a bit more, of Heinold pellets a day, plus hay and some veggies. He never cleans the bowl, though, thus I'm wondering about what to do each day with the extra he leaves in the dish. I refresh his hay 2x a day, although it's never totally gone when I do ... I just figure he'd appreciate a freshening up.
P.S. Can you believe that when I bought him 9 mos. ago, the breeder told me 1 cup of pellets a day? I quickly discovered that was insane. I added hay to his diet and some vegetables and cut his pellets to 2/3 c., then down to a bit more than 1/3 c.