Oh dear, poor husband! Difficult question to answer. There is the ideal and there is what some people do who don’t even know they’re not supposed to. I’m sure there are loads of hog houses around which have been varnished.
But, how easy going is your husband? Also how easy is it to change. If not too difficult, personally, I would try to change it. Especially if you are hoping a hog might have hoglets. It would be better for them and more likely they willl use it. Easy enough for me to say! I have no idea how easy it would be to do.
