Ummm...do NOT use those to try to stop a dog fight. They'll just make the dogs angrier. They don't know where the pain is coming from so will lash out. AND, dogs are highly resistant to the stun guns. They can/do keep going at the same voltage that would drop a man 20x over.
A perfect example happened last month. Police stunned a Newf (female about 100 lbs) 4x. Didn't do a thing. It's a long story and irrelevant here, but the stun gun just did NOT work at all, except to freak her out.
You might want to consider an air horn. You only need enough time to get them apart so you can put a leash over their heads and remove them from one another.
One way to stop it if there's a fight and there are two people. One person gets behind each dog. Pick up the back legs to your waist or chest height (depending on the height of the person and the dog), and wheelbarrow it backwards when the head drops. They cannot bite you that way, and when you do it, within a minute or two the head will drop. If they're latched on, keep the legs up and slowly start moving back. KEEP THOSE LEGS UP.
Once you get them a safe distance away from one another, and are in separate safe spaces, check them over for bites, slashes. If you find any, wash out with sterile saline solution (from a can which you can get at WalMart or a drug store)...shoot it directly INTO the puncture/gash. AND, then give the dog Amoxicillin right away. 500 mg for a Golden every 8 hrs for about 2-3 days, and depending on the weight of your other dog...about the same. That will save you some HUGE Vet bills, and infections from bites. Ask your vet for an Rx to have filled at Wal Mart and tell him why you want it. I have a rolling Rx for things like that for the dogs....as do most kennel people, handlers, breeders, etc. No reason you can't too. But ask the Vet for the proper dosage.
Goldens are vicious, ferocious fighters. I have 7 right now, and have had more in the past. They jump in and out and slash and bite. They can do damage quickly, and often aim for the neck, face and, amazingly, legs.
IF they're not fixed yet...get them fixed, unless they're being shown in competitive AKC shows. That will help reduce the testosterone...but will take about 5 - 6 mos to become totally effective and you see some sort of behavioral change.
One thing that's very very important. When they start fighting, do NOT yell, scream, or freak out. Stay calm but move fast. Have some slip leads close to your back door (they're like lassos) so you can
throw them over the head of one or the other. AND, once you've brought them in, checked them over, done your first aid...and their adrenaline is back down to normal ranges, put them back in a room together. DO NOT SEPARATE THEM FOR DAYS. Only a few minutes. The longer you separate them the longer it takes for them to get over it...and you can end up having dogs that hate one another on sight, so you can never put them back in the same area.
Just stay there with them for a while, until you're sure they won't posture anymore. If necessary, keep the slip leads on them and you and your hubby each hold one. Watch TV or something for about 30 mins that way. If they start to growl, posture, or even LOOK at each other, just say "cut it out and go lie down"...firmly. DO NOT pamper one or the other, DO NOT yell at either after the fight...just act like everything is perfectly normal (and have yourself a nice drink).
The key is watching body language. When you see them "eyeballing" one another, or freezing in place...or hearing a whine or low growl, YOU act before anything happens. Tell them to cut it out right then. And mean it. If you feel that a fight is imminent, throw the leash on them and tell them to lie down...at your feet.
Keep an eye on them and see if you can find the "trigger" that sets off a fight. Is it bones? Toys? What IS it? If it's bones or something like that, then just take them away and only give them in separate areas. Same goes for toys. Sometimes its YOU. They're fine until you walk into the back yard. One comes running up...the other attacks that one. If that's the case, do NOT yell at the one attacking. Start saying GOOD BOY to the one running up...and be ALL happy to see it. Sometimes the attacker is protecting YOU from the other dog running up to you, but if he thinks you called that dog, and are happy it's coming so fast...he'll often NOT attack. He's responding to your cues. Happens here a lot. I've learned that even if a dog is barreling at me at top speed, when certain pairs are out together I have to encourage that dog in a happy voice to COME...so the other dog won't attack. Reverse psychology I guess. Oh, and make sure to sidestep the dog so you don't get knocked down when he thinks you're calling him all happy to see him! LOL
I have 15 dogs right now. 6 Newfoundlands...all over 100 lbs, most around 140-160. Goldens that range from 55-85 lbs. An Am Bulldog that's about 70 lbs. A Toller that weighs about 55 lbs, and a Chihuahua.
We've had dogs for 30+ years and used to breed Labs and Goldens. We've had our fair share of fights, dogs that hate one another, etc. Right now I have a male Newf and male Golden that just don't like each other much. They're vying for top dog position. The Golden is hyper and the Newf keeps flooring him because he doesn't like hyper. LOL I just let the Newf squish the Golden (he postures over him and then lays on him) after the Golden has danced around and growled and acted stupid for a bit, and I tell the Golden to NOT dare bite the Newf in the face. Doesn't look great in the show ring. He seems to understand. I don't freak out anymore. Just go in, get a leash, pull the Newf off...and that's that. But I let them roll around and do their "fight" thingy for about 10 minutes. Tires them out so they're ready to settle after it's all over.
The Newf weighs 157 lbs. The Golden weighs 65 lbs. Neither wants to hurt the other, but they just have some need to be all macho.
Once I learned to shut up, don't freak out, and do what needed to be done, firmly, we've had a lot less problems here. Haven't had a real "fight" in several years.
Best of luck and I'd also suggest talking to a professional trainer/behaviorist. They can come in and tell you who's doing what. Sometimes the "innocent" one (to you) isn't innocent at all. They use body language to send signals, and often the one who is on the receiving end of the attacks is actually doing something to entice the other to attack. Behaviorists can see this...whereas you can't.
And I highly recommend that you, your husband, and your two dogs go to Obedience classes. See if there's a local kennel club nearby, and check into their classes. PetSmart classes at this juncture aren't what you need. You need "dog people" around, with experience to help you through. I think you might find you enjoy it! And the dogs will do better once you're all on the same page.
Just keep calm....and please don't try a stun gun. It's not a good idea. Nor is a shock collar. As I said these things will more than likely make the fights MUCH worse. The pros that train attack dogs use these things to make the dogs meaner, and I don't think that's what you want. You want calmer, not more aggressive.
Granted all of this is work. It's a LOT of work, learning what to do and when to do it, and what not to do. Training. Obedience. Reading body language. Etc. It's not an "easy answer" like you think a stun gun will be. But that stun gun isn't an easy answer either, and IMO is one of the worst things you could do. I wouldn't be sticking MY hand in the middle of a dog fight to try to get through hair to stun it. I'd prefer to keep my hand....really.
Rule of thumb is to let them fight and get it over with as long as they're not drawing serious blood. That's the only way they truly "settle" the issue, unless you have the ability to be the true leader of the pack, and they know you're NOT going to tolerate any foolishness.
Oh and next time something like what happened to your husband happens again (and it probably will until you figure out how to stop it), tell him to walk away...let them fight...go get you or a neighbor, and then do the leg thing. Do NOT put himself in danger like that. Plus it just makes them more nuts.