I would suggest a neutral meeting. I adopted two girls w/ a male who is not dog friendly except with dogs he knows and female dogs. Its been a long battle. The girls we adopted are litter mates and both are dog reactive . You can read our journey on two of my threads,Two sisters from Baltimore under Rescues where are they now and Going from one dog to three . The one thing a trainer in our area did in helping us have them meetafter almost a month and the lady from our county pound suggested is meeting by walking them in the same direction and alternating who was in th lead . The other thing is the two week shutdown.I think with seniors the shutdown is especially important. Ill be real interested to see what's suggested based on your boys hearing loss. Good luck. seniors are a unique gift and senior GSD are fantastic family memebers. I have to agree w/ Stevenand Zacks Mom a dog who is the resident who doesnt really like other strange dogs could be a real problem. I lived that for three years w/ our pit/lab the rotating and keeping it seperate always left me feeling I had cheated everyone. Good Luck. Im sure gonna check back in on this thread as there are alot of really knowledgeable folks here and Im sure Ill learn more.
GSD Rescue 2/16/2002
Thunder from the East: adopted 1/25/2013
Miss Chevy Cruz - adopted 1/25/2013