@tsarstepan,
I couldn't do that even to a dog i didn't know, let alone one i love. The best novel i've ever read with a dog in it is
Faithful Ruslan, by Georgy Vladimov. Ruslan is raised to be a guard dog in Stalin's gulag from the time he is a puppy. But a few years after he starts, Stalin dies, and the gulag is abandoned. Ruslan's camp is one of those which is shut down. Ruslan follows his "master" (his handler) to the train station, and laughing and joking with his companion, the handler takes a bread roll, cuts it in half, and spreads the wicked hot Russian mustard on it, and then feeds it to Ruslan. To Ruslan, it is the ultimate betrayal, not only for the horrible experience of the hot mustard, but because the only man he trusted is laughing at him.
It's a wonderful novel, and i highly recommend it, but it's a very sad story, so don't read it if you want a happy ending.