We've got 3 Dachshunds
Oscar - the OG, 15 yrs old in December, 2/3 blind, 95% deaf, has had cancer 3 times (including currently) and the vet says he can't have it cut out this time because it's in the muscle. Overall he's not struggling, but compared to 5 years ago he's like a shell of himself. Probably gonna have to put him down soon, but until he's clearly in pain or losing motor function we'll keep him comfy.
Otto - inherited after mom died. 13 yrs old this month. Starting to lose hearing, is in congestive heart failure and is on 3 separate heart medicines, he also has a partially collapse trachea. I get the feeling his demise will be more sudden than Oscars because he gets into fits of coughing from time to time that are pretty unnerving.
Ladybird - 12 yrs old, so far, she's got no ailments other than far and away the worst breath of any dog in existence.