A puppy is eating her words after discovering books are not chew toys.

The Winnipeg Public Library shared a letter to Twitter earlier this week from a dog who regrets destructing library property.

"My mommy wanted me to write you to say that I am sorry for ruining your book," the letter posted to Twitter reads.

The letter, accompanied by a photo of the sorrowful dog Luna, shares an apology for the ripped "In the Skin of a Lion" pages. Most of the book is intact, but the library's stamp, along with the first several pages, are torn.

"I learned that mommy can devour a book - but that doesn't mean I can do that too. This learning stuff is 'ruff!"

The library responded with understanding, saying "these things happen."