It is tricky thing...not like cat kidney transplant(that is generally a win for the shelter rescue donor that loses a kidney but gains a home rather than be euthananized with fairly minimal risk with the loss of it's kidney & good percent of recipent cats do well for prolonged period of time). Dogs do not have same donor pool & success rate is lower. So must be, for best chance of acceptance a closely related dog who in most cases is owned & loved dog. So do you put your pet at risk to save another's??? with only ~ 40% chance for success for the other person's pet? It is personal choice. Personally, I would, if the the needy dog had such dedicated owners as these folks are. My reasoning is would I want same help if my dog was one needing transplant...yep, I would. Does my dog get a choice, no. They didn't get one when I altered them, when they serve as blood donors, when I make other choices for them from diet to vacinations. Would this choice be best for them, no, somewhere down the road that missing kidney might shorten their life. But if I was asked for donation of marrow or a kidney to help another person, I'm there. My dogs have me as an owner they get my choice, & I'd like to consider (however stupid) they are of like mind. Help our fellow beings. Could I regret it ,sure, but would I know why/how I made the choice...and would be good with it. No clear answer just personal one. Mine, would I want someone to step up if it was my beloved pet, I would, so in all fairness must do what I would hope for.