Here is a video explaining this part of answering. And this is how you add to comments, questions and bio of profile:

*When inserting photo in comments or questions they may fade after awhile.

By using the " Insert Image" button on the row of icons where you answer. Third one from the right! Pick your image from your files or where ever it is and then click "Choose File" and then drop it in the box and click "Insert".

www.youtube.com/watch?app=desktop&persist_app=1&v=E8

Beavers, mice, squirrels, porcupines, deer, bear...  It's a huge list!  This might help you identify your culprit.

http://www.forestry.gov.uk/fr/infd-6k4kaf

It's from the UK, brb with a US link.

Edit:  this one shows a picture of beaver damage where they just ate the bark.

https://www.americanforests.org/magazine/article/the-language-of-bark/

We've also seen that here in the UK by black and grey squirrels. We have very few beavers here, so most of the other damage is caused by deer (and then only in bad years when the grazing is bad).