Our dogs will find, drag up and consume at least two deer carcases each winter. Raw venison, won't make them sick but we have a heck of a time keeping the intestinal worms at bay, both round and tape worm infestations, which I believe is from eating the deer.
The tapeworms can also come from snails. I've watched my dog gobble them up from the front lawn in the mornings. They can also get the roundworms just by licking their paws.
Animals who go outdoors at all should be dewormed every three months. I alternate two types of dewormer so we don't breed resistant parasites.
One of my cats is a Great White Hunter and we play hell keeping his parasite load down.