Souraya, I agree with Jackie! Take him to the vet and give the bill to the neighbor. If this dog came into your yard then it is their problem.

On the other note though, I am sad to hear Drake got hurt in the fight. And how brave you were to get inbetween the two fighting dogs to break it up! I am glad you didn't get hurt! If you don't feel comfortable giving the neighbors the bill, then atleast let them know that the next time you will press charges.

Let us know what the vet says!