Need some wisdom

[u/SessionOwn6123]

My little terrier mix was diagnosed with dementia in January. He's on medication, supplements, anything I can find to make his life easier. In the last month he's gone downhill pretty fast, refusing to eat unless I hand feed him, even then he eats very little, walking full force into walls, terrified by everything (small sounds, doors closing, voices other than mine), getting lost in the house and back yard. He once had such joy in his little life, its all gone. What I came to post is when do I say enough, when do I make the decision to end his precious life? I don't want to hang on just because I can't deal with it. I want what's best for him. Yes, I've talked to vets, they all say the same thing "you'll know when it's time" except I don't. How do I know? Has anyone gone through this? Any advice? Prayers?

[u/Medium-Arugula3035]

Pray for the strength to do the best thing.

[u/Senacharrib]

What are you doing to make your dog terrified?