My dog is afraid to the point of aggression of my boyfriend's dog

I think this is a behavior issue with grant and not reggie. I'd work to correct Grant's behavior and keep him out of reggie's space.

A spray bottle will work, but basic old fashioned training will work. Make sure grant (and reggie) know "down". Which should mean, lay down and be still until released. once you have the pesky dog trained to lay still, putting him in the same room with Reggie and "down"-ing him should let him know not to screw around with reggie.

He'll catch on that his offensive behavior isn't allowed. So long as you have the basics installed so he understands what you're trying to teach him.

I know others have said a behaviorist and this is good advice, but taking my dog to basic obedience classes worked wonders for me. I took in a dog that had aggression issues, which I believe were out of fear. I am not saying Reggie is aggressive (I think he is just trying to tell Grant to back off), just that the training helped my dog become more confident and less fearful. I learned to be a pack leader to my dog and he felt more secure. He is now able to play with other dogs at the dog park and has basically learned how to be a dog. I also think basic obedience can help your boyfriend learn to control Grant's behavior. This is an option to at least consider.

Have to agree with all the answers here, but one other thing to mention, sometimes a dog, just doesn't like another dog. I tried to introduce another male into our family and no matter what I tried, they just wouldn't get along.

Since Grant is newly adopted AND neutered I would give things time to settle down and the 2 boys to get used to each other. How about a spray bottle of water when you see Grant invading Reggie's space? Maybe a quick spray would teach him not to do that. Set some rules for the 'new kid on the block' and give them time.

I wouldn't call it aggression. It reads like Reggie is trying to get Grant to give him space. Try blocking Grant from getting to Reggie. Anytime he pulls to get to Reggie, correct him with a sideways yank on the leash. Then have him lie down in Reggie's presence. Or consult a behaviorist.

Part of the problem could be the "recently" neutered issue, it takes a 2-3 months, sometimes more, for the testosterone out of the system. Things may settle down after a couple months. Consulting a behaviorist is a good idea, not a trainer, a behaviorist.

Your dog should not have to have another dog hump & lick and generally invade his space, the humping can be a sign f dominance, I don't know if you live together, if not, do not bring the dogs together without professional evaluation, if you do live together the dogs should have met before adoption and until you get professional help Grant should be kept away from Reggie, if a fight does happen Reggie will not win, they are your options !

I would seek out a behaviorist ASAP. It is not fair for your dog to be bullied by Grant. And one day it WILL lead to a dog fight-and guess what-a pointer vs a pit bull-your pointer will lose.

check outwww.ddfl.org and , it may answer some of your questions.

hope it helps, good luck!!