Can I bring life back to dying tree?

I planted an acorn 25 years ago. It was beautiful. My dog insisted on chewing the bark until he finally chewed all around the tree - it seems the tree is dying and I understand why. All the leaves are turning brown. Is there anything I can do to save my "baby"?
  3 answers
  • Janet Pizaro Janet Pizaro on Jun 13, 2017
    Seal up the holes with pruning spray and use a systemic insect control.

  • 13526476 13526476 on Jun 16, 2017
    If the plant has been girdled, it's questionable. I'd check with the county ag office or a local tree farm (arborist). Continue to treat it with TLC in the meantime

  • Jewellmartin Jewellmartin on Jun 17, 2017
    And it's time to surround that tree and others your dog might chew with chicken wire or even stronger fencing. Try to give your dog something else to keep him entertained and distracted, like maybe his own dog buddy. Best wishes 😇