My dogs start the day chasing a deer. The deer stands in the field almost every morning staring at the house waiting for me to let them out. I am not sure who enjoys this more, me, the dogs or the deer.
I get that look a lot and I swear they are all smiling once their morning chase is over. I wouldn't be shocked if one day the deer is waiting on the porch for them.
That is quite a phenomenom. You are lucky to see that camaraderie between 2 disparate species. I run an animal site on FB. If intersted... https://www.facebook.com/groups/1439682046249040