How can I help my newly adopted rottweiler to lose weight and live a longer life?

nicole p questioned:

I adopted a 5 time ancient rottweiler days gone by. His seems to be inflicted including an awe-inspiring personality but he is hefty. Im frightened including the intention of since of his consequence and his age including the intention of he wont be in this planet to lingering. I want to get him to loose approximately consequence so he is healthier. If I do get him to drop consequence will including the intention of get on to him be inflicted including a healthier longer life? And what are approximately traditions I can get him to drop consequence? How greatly should I exercise him lacking over exercising him?