Good advice above, particularly Coffeking and PK
Having had to take 2 dogs and 2 cats ‘down to the vets’ over the past 5 years it is a heartbreaking decision (I still get upset when I come across pics or threads like this ) :cry: but one which only the owner who has cared for and knows the dog can ultimately make. Your dogs eyesight failings and inanbility to get round the block are just old age but the criteria I use to make any decision are –
Are they in pain or suffering ?
Is their quality of life such that they are depressed/miserable/aggressive ?
Take the vets advice as to what is best for the dog not you.
Whatever you decide, you can take comfort in the fact your ‘litte mate’ has had a wonderful life with you.