By SONYA CHUNG
The dog is 13 this year; that’s 91 in human years. He’s pretty spry, all things considered, but the changes are noticeable and frequent as of late: he is slower on our walks, resists the longer distances, has trouble with stairs and with standing up or lying down. We’ve just invested in a ramp for the car. I’m reluctant to subject him to long car rides anymore, given how stiff he is afterwards from limited space and dehydration. This is the dog who’s traveled cross country twice, and up and down both coasts several times.