Mommy horse!

Rob was reading a new book to Nate about horses last night and I heard... Nate.. 'look, it's a mommy horse!'
Rob.. 'Oh yeah? Maybe that is a mommy horse'
'Nate... 'No! it has hair like mommy's!'

Rob.. 'Wow, yes buddy that horse does have hair like mommy'
He turned the book around and...