I didn’t realize how dogs age. When Nellie was a puppy she could leap small buildings…. Her hair was short. As she got older her hair got way long and one day she couldn’t leap onto our bed anymore. It all happens so gradually. I always chased my kids and pretended I couldn’t catch them until one day I couldn’t. I don’t think that they realized this for a long time. Last winter we skied and I couldn’t go down the mogul trail with them. You get a little wisdom with age. Not much but a little.