Hmmm... Could he have gotten hurt playing and wanted nobody to come close to him? Or maybe it's toy aggression that caused the growling ... I don't really know just trying to think of some answers.. It's odd that he didn't wag his tail when your husband came close. I don't really know. Maybe you could look up the symptoms on google?
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Jaxx- german shepherd, born november 11th 2012
"i approached a kid and asked, what is love?
he replied, love is when a puppy licks your face.
i laughed but then he said, even after you left him alone all day..."