There is nothing, when squared, that is negative unless except, of course, i, which is imaginary. However, the products of multiplying together, or squaring their IQs, likely all get even smaller, meaning they all start out less than 1.0. Unless you mean that BO is the dog Bo. In which case, his IQ likely starts out above 1.0.
But the OP is also right—they wouldn’t have made “minus zero”.