I went to a house a few weeks ago where some of the kitchen receptacles weren't working. I started my investigation and didn't find anything in the kitchen that would cause the problem. I asked the lady if there were any other receptacles not working and she said maybe one in the dining room. I found it and removed it. It was totally corroded like you see from moisture. I asked if she had a water leak or problem anywhere near there. She said they had a water heater leak in the next room. I said unless it was on this same wall, or enough water leaked to reach the height of the receptacle that the leaking water heater couldn't be the cause.
I showed her where the bad receptacle was and she said "Oh, I bet I know why, we have a dog that we can't break from raising his leg on just about everything in the house and this is his favorite spot."
Thanks alot lady, after I have handled this urine soaked thing!!!
BTW, replacing the recep took care of the nonworking ones in the kitchen.