My brother in law and his wife have a 1.5 year old cocker spaniel. Whenever he sees my 8 month old he barks and is also visibly stressed by my 3.5 year old. Children are never unsupervised with the dog but I'm alarmed by BIL's laissez-faire attitude - whenever the dog barks at the kids he brushes it off and says "oh he's just being playful, don't be scared". To my mind my 3.5 should be scared of a barking dog and follow his instinct - to withdraw! Are there any resources out there to show BIL and SIL that this is dangerous? Or am I overreacting?