Cute picture, but get real. As far as I know, dogs associate chickens with meat and feather ripping rather than with cuddles. My dog is a prime example of this.
I've got to adult shepards mixes who never touch or bother the chickens.
I've had ferrets and a dove that climbed on the dogs and were essentially my training aids...so when I got chickens...they knew they better "be nice." And I've been fortunate enough to never have a problem.
When my old shepard female passes and I decide to get a puppy...well, I can see where thorough training will have to be had...because I can see where a playful puppy might think it fun to chase...but with training, I expect a good dog like the ones I've got.
Not all dogs are bad. I have a dog that protects them like they are her own puppies. If I happen to pick a chicken up and it sqwaks she comes racing over to make sure I am not hurting her "babies". My other dog on the other hand, well he is a Golden Retriever and has champion hunting bloodlines. He won't hurt them as long as he is on a leash and I say "Leave It!" but I would never trust him off- leash around the birds since he wants to do what comes natural to him and retrieve them. It's not his fault. I have had him for 8 years and have only had chickens a year.
In fact, just last night I had the 2 little ducks out with my dogs and went in the house and when I came out the dog was laying against the back door and the 2 ducks were sitting less than 3 feet next to him, next to a puddle.