I think any good agressive hunting dog should be able to handle a mongoose if it can catch it. I have German Shorthairs and my male is sharp on many animals. He has had racoons, opossums and feral cats. He goes straight in for the kill and doesn' t give them much chance. A mongoose is a lot smaller, one bite and they would be done. I think you could also look into some terriers. I know some were breed for hunting badgers and wolverines there pretty tough little dogs.