How do I get my dog to stop attacking my other dog?

Give Frenchie the boot.

NEVER HIT A DOG!!!!! Under any circumstances! Dogs don't learn by being hit or smacked and it can only lead to worse behavior... You either need to seek the assistance of a professional trainer / behaviorist in order to assess your dogs and see whether you can devise proper and non-cruel ways to effectively correct your dogs, or you'll need to keep the dogs separated at all periods of time as things will only get progressively worse, perhaps to the point of bloodshed. If you don't have proper dog training experience, you should never try and raise multiple dogs, especially such disparate breeds... It takes a certain "mindset" to run a pack effectively and advice / message boards are not the place to seek advice (such as the previous posters who suggested hitting the dog!)... Call a certified dog trainer TODAY!

Let em duke it out. They are just trying to establish the alpha role. If you intervene in the process, they will never get along. After the alpha takes charge, they will eventually learn to like each other.

one thing you should do is try to put one dog in different area by tighted the dog up and onto a heavy table or chair then other dog put her or him in another spot by tight the the dog onto something with a strong leash or rope. see what theyre going to do or you can keep one inside one room and another in dog house or outside. if they dont get along then you should decied to choose to give one away to somebody else who will takecare it .

They might not ever get along. You might have to keep them apart a little longer.

let them fight it out, just stand by and make sure that nothing to serious happens, big vet bills for a missing chunk out of one dog is no fun

call Cesar the dog whisperer ! animal channel !

separate them

every time he attack hit him

hmm, keep them seperated