What Went Wrong?

My big bro and I were talking while I was coughcough "doing" school reading, and we realized that once a long time ago, my twenty pound cat could actually jump on to our pool table. I ask myself what went wrong? Is it my fault that now he can barely jump up onto the couch. I only gave him cat treats constantly, and fed him five times a day, just being a loving owner. Well......if loving is throwing him down the stairs.......hey in my defense I was little!