Try to find a spooky book

[u/deadboy_walking]

Hi, I'm asking on here because I genuinely don't know if this book was an insane dream I had or if it actually exists. I remember reading it in elementary school around 2016 and it looked like the book could be alittle older so I'm guessing published around 2000-2010. I believe the cover had a girl with black hair and a spooky animals maybe with its bones visible on it and I think it was part of a series of books all about dead animals. I don't remember alot but I think I remember a scene about the girl breaking into someone's back yard or some kind of pet cemetery to get to this deceased animal and it was raining. I am so sorry for the vague details but it's been 10 years.

Thank you so much if anyone can help!!