I have a 5 month old German shorthair pointer, who two nights ago chewed a basket up. She is now yelping when she stretches or if you touch her stomach, her stomach is warm to the touch. She seems to be eating/drinking normally but her stomach is bloated.
It will be necessary to make an X-ray image to observe if the splinters could be found and if there are some injuries. In any case, you should take her to the vet as soon as possible.
All the best,