For many years, the srdogs site listed shelters and dog rescue agencies throughout the United States and a few in Canada that were known to be helpful when faced with trying to find homes for older pets.
Fortunately, these agencies now have their own websites and you can find them easily. Thank goodness for search engines and AI!!
Just enter your query into any search engine -- something like -- "want to adopt a senior or older dog in or near my city....."
You will promptly get a list of both shelters and rescue agencies along with links to such websites as Adopt-a-Pet and Petfinder

