We have a foster golden retriever who has been perfectly fine around the chickens but today picked up one of the hens and moved her out of the run into the yard and dropped her there. I can't see any puncture wounds or anything like that - just a bunch of slobber on her back. She seemed to be a bit in shock and was open mouth breathing on my daughter's lap for about 10 minutes. Now she's hiding under a shrub and doesn't want to come out (the dog is inside). I did tempt her out with a blueberry which she ate, then went right back under the shrub. She's walking fine and I can't see or feel any injuries. The question is: should I worry about this - just observe and keep the dog away - is this normal retriever behavior? Or is this something that has happened to others and not something to be concerned about?