[matt f]

My guide is when they stop eating and/or lose control of their bowel and bladder.
Also, personality changes are a significant symptom.

Of course, the age of a pet must be considered.
The above changes in a young/mid aged pet are differentially diagnosed by DVM and appropriate treatment initiated to get pet back to health.

The best interest of your pet is tantamount, not your feelings.
I always "just knew" when it was time, yet in hindsight my buddies were telling me to let go.

When it is time, go with them and stay with them throughout the procedure.
Your pal deserves this.

I hope some of what I have experienced is of some assistance.
This is never an easy time and I wish you and your pup well.

Matt