My daughter has been having a great deal of trouble with this recently. We were at a museum where they showed trash that had been left in the park and one of the trash items was a stuffed cat. She was really upset thinking about both the child who had lost it and the cat needing to be cleaned up and cared for. If we could have brought it home for her to clean, she would have done so.
That would have upset ME even. Still remember losing my favourite stuffed dog on a trip - 7 years old, fur loved off, I'm sure it ended up thrown in the trash by an uncaring person.
Give your daughter an extra hug from me, will you?