I'm not so vain as to turn someone down because they hate something I love. But if someone has a comically overstated hatred of [i]anything[/i] there won't be a fourth date. Don't like dogs? that's cool. But you might have a problem if you belong to a discord/reddit/facebook group that hates dogs, actively downvote things with dogs in them, constantly rant about how much you hate them... yea take that shit somewhere else. 

Real talk though, if you hate dogs you aren't romantic material.