I'm not sure what your local laws are... and I hate to put it this way... but what about vandalism of property??

Also take the dog to the vet or call and see what can be done. You may also be able to make them pay for the cost of treatment.

I doubt any of that will bring about significant "damages" to the tree company though.

So sorry that you had to be the victim of some of humanity's evils. *hugs*