I lost my dog last year. I adored her but she was very difficult - aggressive and neurotic with chronic pain issues - and her life was a bit of a soap opera. I engaged no less than 6 trainers and behaviourists in her lifetime, she was a frequent flyer at the vets (she had surgery by Noel Fitzpatrick), and cost me a fortune.
I posted on online dog forums a lot about her over many years, begging for help. People were fascinated (and amused) by her antics and my efforts, and kept encouraging me to write a book about her - apparently I have a humorous writing style, but you'll have to take my word for that. 
I wrote 12 chapters and 25,000 words in 2010-11 (as a blog), and haven't even got to her accident yet.
Now she has gone and I have an end to her story and I'm no longer crying every day without her, I've revisited what I've got and I'm seriously considering finishing and pitching it. But I'm under no illusions, and doubtful as to whether there's a market for it.
What do you think, would you read it? It's in the style of Marley & Me I suppose, but she wasn't so much loveable and naughty as vicious and hard to love. There is plenty of conflict and it's a story of never giving up on them, no matter how dark things get, because all they have is you.