New neighbors have two chihuahuas - I have a papilion and King Charles Cavalier. My dogs are very friendly with all people and pets. Everytime the chihuahuas are outside they bark constantly - mine will stand at the fence, wagging their tails and not barking. Their owner said "they'll have to get used to you." Its been three months and no improvement. We try and confine our dogs when we see theirs outside and bring ours indoors immediately when theirs are out. I've read about the "rebel" and other products - has anyone tried them - and were they successful? This has become a major problem as I have a sleeping disorder and their barking is driving me crazy.