I am sorry for your loss, and very much understand your pain. We had to euthanize my darling dog, Lexxiss, yesterday. She, too, was born in 1996.
I wasn't perfect OP yesterday, and the pain is certainly not going to be gone today. I am getting right back on track because I know that no amount of self abuse manifested in overeating will bring her back.
My plan for today; take my other dog for a walk, ride my bike to the pool (I haven't done that for 6 weeks caring for Lexi) and prepare healthy meals. Reading and posting here helps me, too.
Bless our pets; they love us so much. I am greatful today that my pooch doesn't have to suffer any more. She wasn't getting better.
Many warm thoughts directed your way!