Farewell my lovely Abby the Tabby.

Dear George,
I am distraught. I have lost my playmate, Abby the silver Tabby. We spent hours and hours with each other - chasing each other through a tunnel, poking each other, rolling around on our backs, biffing each other, embracing each other in a rough way. It was such fun.
Now she has gone. I am betrayed by Celia who packed her into a cat carrier, handed her to two strangers, who drove off down the track with her. I shall never see her again and there is nobody to play with.
Tilly, my tortoiseshell companion cat, dislikes me. I try to play but she just runs away. Would you believe it? She lay on her back on the concrete outside the house and rolled in pleasure once she knew Abby had gone. She's a real loner and I can't see what Celia sees in her.
Here are some of Celia's videos with Abby and a photo of me and Abby counter surfing. My heart is broken.
Yours sorrowfully
Toby.

Dear Toby,
Life is full of greetings and departures. You were Abby's mentor. You helped her grow from a frightened kitten (here) to a domesticated pet. She owes her happiness, in large part, to you. Try to remember that and be glad you could help her.
Now she is setting out on a new and happy life, in a home she will never have to leave, with a young human couple who will make good pets. She is young. They are young. She can live to be 20 years old with them: something she couldn't do with your older pet, Celia. 
Yours sympathetically
George