Our rescue dog is 14.5 years old.
He's struggling to stand up as his back legs are so wobbly. He can walk a bit once I prop him up.
He can't squat to do a poop as his legs just give way under him. I have to carry him up and down the 8 stairs into the house. He's quite heavy.
He's eating and drinking fine though. Seems ok in himself.
When is it time? I just don't know. I've never had a dog this old and get to this stage.