I am sorry for the loss.
My dog died last month. A German Spitz/Pomeranian.
He would have been 17 years old in July and a great company for the family. In the last months leading to his death he lost many of his abilities and he was in a bad mental and physical condition. No one in the family agreed to put him to sleep.
He passed away one morning and I dug a grave in my garden and buried him like a human.
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"Porsche....and Nothing else matters"