What is the ideal weight for french lop. When I got Alfie three weeks ago he was very boney and under weight. I took him to the vets and he weighed 3.3kg. He had a dental and neutering and stopped eating after that so he was weighed again at the vets and had lost 300g. Now two weeks later he is eating ok so I weighed him today and he's 3.7kg but he's still quite boney.