Your husband’s job sounds so cool!
It’s really hard to tell if he was abused or anything. It could just be that he only had contact with women when he was a little baby and thus trusts them more. Or sometimes, nervous animals can be scared of men just because they tend to be loud and boisterous.
My dog growing up had a fantastic upbringing (raised by a husband and wife who treated the puppies like family), but she was naturally a nervous dog. My male neighbor scared her to death because he was loud and would shout to her “Hey Cindy! Come here!!” which she thought was so scary. Lol. She loved my neighbor’s wife though, because she was quiet and calm. No men ever abused her, and she loved my dad who doesn’t have a loud personality, but she was very suspicious of most men in general. It could be that Hatter is just a bit nervous and his personality clicks more with yours, so it’ll take him longer to get used to your husband’s personality.