We just lost (13 Feb 2020) our Chihuahua. She was a rescue, about 2-4 years old and we had her for 12 more years.
She developed a case of doggy flu and even though she was drinking water, she lost most of her appetite.
Three days of going to the vet for an IV each mornong and picking her up at 5:00.
She was sitting on a potty pad on the bed, between my wife and I.
She stood up, stretched and stood up on her hind legs, licked and kissed my wife, walked over to me and lay in my lap, and just quit breathing.
Our baby was gone, without ever crying out, whimpering in pain or gasping for breath. She was just gone from this mortal life.
Of course it's tough, but we'll live on with her, and the other Fur Babies we've lost over the decades, but without sadness, we'd never know happiness.
Itzy Bitzy Baby Ladybug
Adopted: April 2008
Died: February 2020