Let the vet decide if it should be fed. I am guessing the vet is going to sew it up, inject the animal with vitamins, and possibly force feed a super nutritious formulation to get it hydrated and get its digestive tract working properly.
Tube feeding Carnivore Care thinned out to a slurry would be easier and less stressful than a force feed.
Hopefully this snake isn't sick, just malnourished.