It is amazing that animals can form a bond to humans. I know humans say they "love their pets", but this is proof that pets do feel love and do love their humans.
When my Mom would fly to Germany to visit her Mother for 6 weeks, upon her return our family dog would cry like a baby, and I mean cry, when my Mom would walk into the door. When I say cry, I mean it was a cry like no other. Once she was held and loved, the dog would stop crying.
Tom