At some point, you’ll have to consider putting him to sleep if his quality of life is compromised to the point he’s in pain and suffering.
Until then, enjoy all your time you have left together and make them happy memories.
The little guy is still the alpha male much to the chagrin of one-eyed Hank, my rescue Border Terrier. Bobbi, my Cairn mix girl defers to both males.
Every day I tell them I couldn't love them more, and then I do.