:D I just now had this same damn thing happen. Taking Leela, our 5 month old GSD for her nightly walk around the yard, and of course she tries to grab every thing that moves, (mostly toads). I have her on a leash, and I carry a torch with us, telling her to "leave it" and make sure she does. She decided to sit in the garden fixated on something, I couldn't see what, and then "POUNCE" like a cat and then spat out a small toad.
Shes ok, but it looks like more "toad patrols" tomorrow night for me and my daughter. She carries the bucket, and I carry the Dettol spray. We got 13 fair sized ones the other night, and living on acreage with a swamp down the back, its never ending. I know you shouldn't spray them because some say its its "cruel", but what they can do is far worse and they are a totally useless pest, so I sleep fine at night regarding that point. Leela stays inside at night, buts its a shame when we have to go and get her and drag her inside as night falls, because thats when the pests come out of course. On the other hand our green tree frog population is exploding, great to see.
Might have to try the netting suggestions etc on the fence bottoms to try to keep them out.
Hoo Roo