Sound quite hefty to me. My pure bred lion head is 1.56kg, my lion head/dutchy is 2kg dead set, my dwarf lop is 2.26kg and my german lop is 3.54kg. All are healthy weight but Lola the dwarf lop who could do with abit more chub; but he dental disease makes this rather difficult. I'd say they weigh abit much personally, but it does depend on the bunnies build.