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It sounds as though he has decided to move on and whatever the fight was about, he doesn't seem to want to make up, has thrown the towel in and is holding a grudge... for now anyways.
He may carry this feeling to his grave, may never come around. However, if you approach him and try to initiate convo, you just might be able to soften the blow and at least start yip yapping again.
And if you decide to just let sleeping dogs lie, then it looks like you stay in the doghouse while Rover continues to Never-----Roll over and beg.
He may be waiting for an apology from your end... just thought I might throw you this bone...
Good luck. xx