Found it, here it is, post #8:
http://www.yorkietalk.com/forums/off...8196-hawk.html
Yorkiemom1: "I even called the Houston Zoo and spoke with one of the bird experts there...I wanted to know if hawks and owls saw color....she said yes, and she told me those little dogs look like rabbits....so I put neon orange vests on them when they are outside...."