It is a heart breaking position to be in. Our first Springer was 13 and a bit - was having problems with his back legs, and most likely, luekimea. Steriod pills keep the elgs going.
We always vowed than when he no longer wanted to go out for walks , then the time had come ...
We went to Oz for three weeks and left him with my dad. When we came back, he just fell down the stairs, happy to see us. But that was the realisation that we had left it too long - and were keeping him going for us, not him. He could barely stand, his fur was dropping out however , underneath if all , he was stil Stan, and we loved him.
We made the decision there and then - he had always been my dog, but my wife stoically said she would take him to be put down.
I made him the biggest bacon sandwich I could - and feed him a big bar of Cadbury's Dairy Milk - and then off he went.
It is truly heart breaking - I said I would never have another. the house felt emply without him etc. However, as time went on we enjoyed the freedom etc
We have another , who as caused us real heartache - he was mistreated/ mis trained etc by the previous owners and breeder. He is my wife's dog. Very much so. But when it is time of him to go, it will be teh same feelings.
Do the dog a favour - he cannot make the decision but his quality of life will be rubbish. If he loved walks and can no longer do them, then make the right decision. You will feel like shit - but it is the humane thing to do. Toby is suffering - help him