Lionheads are not an all to new breed to the world of rabbits. However, they have not yet received permanent status under ARBA. We are hoping at the 2013 National Convention that will change. There are two mane types to a lionhead, single or double mane. We only work with the double mane lions. A senior lions ideal weight should be about 3.5lbs. To see the working standard for lionheads please visit http://www.lionhead.us/aboutlionheads/standards.htm on the far right side of the page you will find a printable standard.