Irving [Adopted 11/9/13] age is anyone's guess.  His shelter paperwork said greater than 7.  We are saying he could be ten.  All we know is that he has the energy level of a 3 year old.  Last week he tried to climb a tree to get a squirrel.  For this reason , we don't think a home with cats  would work. Irving at a weight of 15 pounds is not much bigger than many cats.  He is crate trained and house trained but really does not like the crate.  He really does not need one.  He is quite thin.  We are not sure if he will gain  more weight or not,. He is so energetic, that this might be normal for him,.  We ran a blood panel and he is a healthy guy.  We have put him on a diet with more carbs so maybe he will gain a pound or two,