Okay Everyone..I have this little barking issues with Tumi and Gracie. Every time they hear someone by the door or the hall way of our apt, they go nuts and bark like crazy..sometimes for 5 or 10 mins. We tried spray water bottle and tried to stop them but it is not working. I know it prob. goes on when we are not home also every time they hear foot steps. We just got an anonymous letter saying that the neighbors are afraid of passing by our unit late night or early morning fearing they might disturb the whole building. We don't know what to do. Hubby and I are thinking about Ultra Sonic bark silencers. We don't think the collars are gonna work since my girls are way tooo small..please help!!