Our one male just took his first meal in 166 days. If you are wanting to breed him you should probably get him back up to a good weight where he looks healthy before you pair him. Once you start pairing him he may go off again so he should have some size back on him first. As far as offering them food, just try every other week and use a smaller size then they would normally eat. Also use very warm water to heat them and it may provoke a response. Good luck