Can't help you with the plant but have some advice on the dog. I have one that likes to treat my house plants like her own personal salad bar
so I invested in a bottle of bitter apple. You can get this at a pet supply store (PetSmart, PetCo., etc.)
Harmless to plants. Non toxic to water and humans and animals. BUT leaves a horrible taste in the mouth that dogs and cats find horrific. Doesn't make them sick they just don't like it and find it repulsive.
Uh...also may I suggest not taking big whiffs of it or talking while you spray the plant as it leaves the same nasty taste in YOUR mouth.
and make sure to wash your hands real good afterwards as you don't want it transferring to the food.
Pretty much discouraged the dog. Still find a few 'nibbles' or leaf tips here or there on the plants but no mass carnage or destruction to them. You probably know this also as it is common sense but I found putting mine up higher helped matters also.
Hopefully by deterring the dog and following the above advice from others on your plant it will regenerate and be happy again.
Good luck with your plant.
AG