Tomatoes are essentially weeds, so "pruning" them (trying to sound optimistic here and "spin" what the animals did), unless it was very severely, will only delay their production of fruits. But I can’t see (unless you send me a jpg!) how bad the situation is, and whether they deer ate enough to mean the setback time will be so long they will not recover, and that it’s best to buy new smaller plants fast. Most impt: Are you now enclosing the plants in some barrier or other (whether these plants to let them regrow, or a new set of plants to replace them?). The critters will be back. I garden behind an 8-foot heavy-gauge metal fence, fyi, after years of tolerating such bad behavior by local deer. No more.