a day earlier before i noticed that my dog was barking at my kids, to me that seemed like for nothing. my brother-n-law came over w/his kids. the 5 and 2 year old was afraid of our puppy but his 5 month old (of course) was having the time of his life. he was pulling my pups ear and squinching it's fur..my pup accepted it but soon began to try to get away and (maybe an idiot)brother-n-law kept putting my pup for his baby to play with. i was trying to tell him the pup doesn't like it and can get frustrated and bite or turn on the baby... or even later cause the pup to not like kids... he disregared and said at this age pups are harmless and implying they are submissive...i was so angry i remember someone said that dogs have great memory and a bad experience w/one kid can make him hate kids...is that why she's barking at my kids? oh yeah, and he was pushing my pup on his two year old who was screaming terrified of my pup(you know this guy is 30years old)man i am angry.
It sounds like you need to smack your brother upside his head. Your poor puppy was probably overwhelmed by everything going on. All dogs need an escape, a place to get away from overstimulation like this. Repeatedly forcing the puppy on to his kids definitely isn't good for his mental health, any more than it'd be good for a 4 year old child forced on a total stranger. However, don't think that this will ruin your dog's relationship with your kids. Make sure that the dog always has a place to go to get away where the kids aren't allowed to bother him.