I bought two beautiful Tuberous Begonias from a local nursery last Friday a critter who shall remain nameless (resident Chipmunk) mowed one down completely the second is hanging by a thread and looks awful. My question when it starts to get warmer will they re-grow or are they toast and I will need to buy new ones? I was asking on the Canadian Gardening group on Facebook what to do about protecting my plants from the Chipmunk and one suggestion was to put some rocks or even Christmas ornaments around the plants because they love to dig in fresh dirt. I did that tonight. I'll see what happens. As you can see in the photo the one Begonia is hanging on but barely there is another beside it that is completely gone. Will they come back?

Marilyn, remember plants want to survive. T. Begonias stems, leaves and flowers, grow from little spots, called eyes, that form from the tuber. If the tuber is large enough, often a result of age and health, the tuber will sprout more eyes; small tubers often have more that one eye that will produce stems+. (My 7 yr old tuber has 5 stems just starting & I have not yet covered it with soil). The stem with ornaments looks as if it will also produce new leaves--my opinion. Be hopeful.
Don't know how to prevent chipmunks from destroying plants, other than fencing. Remember, chipmunks also want to survive.