Yep, always feed him in his enclosure. You can toss it in like you have been if that's working. If not, you can get some hemostats. They are just like really big, long tweezers. Get a 10" pair. Then you can hold the prey by it's spine and make it "dance" so your snake will think it's alive. Sometimes you need to do this, others times no. It's safer than having your hand too close to a hungry snake mouth though. :)