NC because this is outing.
DDog has stage c MVD, 12 years old, incontinent (to the point that they can be laid in a puddle of their own making, or can walk from one room to the next without realising they're toileting...) and has a chest infection. DDog is still happy doing some training, and eating most of their food. However, 8.5 tablets a day, hacking cough and incontinent.
Quality of life is deteriorating. How do you know when it's time?