If the were flattened, they were tapeworms. If they were long, thin and tapered at the ends, they were probably roundworms.

I've seen both in deer. I once saw a young deer that was just full of roundworms. It was gross, but I still ate it and it tasted great. (ate the deer, not the worms)

Wild critters are crawling inside and out with parasites. We just never notice most of them.