I’m also wondering how long you have you had your second husky? It can take a while for them to adjust and admittedly not all dogs will get along, however that’s down to a clash in personality rather than anything else. If they’re playing fine sometimes then fighting another time then I would have thought that would suggest it’s not full on dislike of each other but something is triggering it off: over excitement can lead to aggression, possession/ownership of food/toys/people etc... as others have suggested a behaviourist would be a good idea as they can see what’s going on and teach you how to overcome it. Any time a new pack member enters the family, it throws everything up into the air and an order needs to be re established.
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