I'm going to hop on the bandwagon and say don't do it, it's like playing russian roulette with your frogs life. There is a good reason we keep the animals that some of us eat in farms. Would you eat a cow that has been grazing behind a highway, inhaling toxic fumes and eating the trash besides the road? Remember, animals travel, be it by jumping, running or flying, you have no idea where they have been.
The only reason to feed stuff from the wild is because you either can't afford food or are a cheapskate. I think that neither of the forementioned people, should own pets.
The entire reason of keeping pets, is providing the best care for your animal and watching them thrive in the unnatural enviroment we create. So don't mess with the basics. That's my two cents