We had a JRT a couple years ago, shortly before we got Yogi. He was 12 or 13 when we got him, took him from a friend's parents who were going to take him to the shelter due to allergies, a change in family circumstance, etc. etc. He was a fine dog and had been raised with kids. He had been left for 10- 12 hours a day in a laundry room, so wasn't housetrained and had a 10 foot tie out out the back door. Wasn't walked, wasn't let off the tie out. Watching him acclimate to a fenced in yard was pretty amazing. He'd go just a little bit further off the deck everytime he went outside. I think it took him about 3 or 4 days before he was using the entire yard, then he just let loose and was practically a new dog! Unfortunately, after about a year he started going blind and deaf and getting very snappy with everyone. Our intent was to give him a nice and comfortable old age, not prolong his life or try to work through the issues of aging. The day he chased our then 5 year old kiddo through the kitchen to bite her foot was the day we decided he'd had enough. He was about 14. He was NOT snappy prior to blindness and deafness.