Neighborhood stray cat killed my 2 cats. Would it be wrong to sick my pits on it next time he comes through yard?

My deepest sympathy for your loss. I know you're so devastated. I'm so sorry. Please call Animal Control and have them remove the cat.

I'm not saying you should, but on the other hand, if your dogs happen to be out when the stray comes through, that falls under the laws of nature.

No. Don't do it. Two wrongs don't make a right. That stray may have something wrong with him or be carrying a sickness. You don't want to pass something onto your dog, do you?

Call whoever is responsible for Animal Control in your area, explain the situation, and ask if they can rid your yard of him. Then leash your pitbull and let him smile as they take the cat away and he watches. (It might make you feel better.)

My sympathies for the loss of two fine pets.

I have never heard of a cat killing another cat. That seems very unusual.

Perhaps it would be best if you called animal services and let them know about this stray cat so that you don’t have your dogs infected if it has rabies

That's a great way to make blood thirsty dogs.
Try a feral trap and animal control.

Chomp chomp

This cat killed 2 of yours at once?

Shooting it is more humane.

Do what you must