I think the quiz is pretty good but a male horse is both a stallion and a gelding so maybe fix that. also maybe shorten the time on the quiz and a adult horse can be big or small
A mother horse is also a mare. The word "dam" applies to the female parent of any animal, particularly a mammal. This is a poor question because (1) "dam" isn't specific to horses; and (2) mare or brood mare is a more common term to describe a mother horse. And, the first question is pretty lame, regardless of whether you added it to "throw them off." Trying to throw people off is not the goal.