What breed of dog is it? If it is a Chihuahua you have nothing to worry about. I believe dogs can sense if people have a good character or not but I wouldn't take it to extreme. Have you mostly been alone with your dog since you've had it? If so, it is most likely just trying to get you to pay attention to it, it's not used to mom paying attention to something else.emmaj said:I have a small dog who shakes and quivers everytime the guy I am kind of seeing comes over. He doesn't do it to anyone else just him. Do you think dogs have a sixth sense and maybe he is a bad guy or do you think he is just having some jealousy issues>I have had my dog for about a year.