Well, technically they can digest meat and other animal proteins, but not easily. Females do eat the afterbirth and often any babies that were born dead, but this isn't something they have to do frequently. Rabbit bodies are designed to digest high fiber, low protein foods such as grass/hay and veggies. High protein, no-fiber foods like meat could easily cause a stomach upset. And I know that humans that have been vegetarian for a while will get upset stomachs if they suddenly start to eat meat again, because they no longer have the same intestinal bacteria that help them to digest it. So it would be much worse with a rabbit which is, by nature, vegetarian.
Of course, the question is why would you want to? If you're looking for treats, there are lots of suitable fruits that are far more healthy and safe.