My first reactions are:
The portrayal of men as beasts is much greater damaging and negative stereotype than a woman as decorator. There is no shame in being a decorator, but it is very derogatory to name person as a subhuman animal. They seem to have oversensitivity towards depiction of women and total insensitivity when it comes to men. What if they reversed the genders here? Putting a animal head on a female and having a man mount atop her back? The contrast between those two situations should effectively illuminate the bias against men. Weather intentional or not I think they could find other ways to show they use merino fabric without portraying males as animals.
I did email a number of people I found on New Zealand MRA sites on this issue but have yet to receive any response.