Has anyone bought any ramps for an older dog walking up and down the stairs? My dog is about 13 and was never so good at stairs so she more just gets her front legs down and then jumps (only about 3 steps). It is a greyhound so she is pretty big (70 lbs) and hates being picked up. Most of the ramps I see online are pretty thin, about 14 inches or so. I am looking for something wider, maybe 2 or so feet or more.