<human>: My boyfriend and I adopted our Chihuahua from Mexico October 2013 when he was two months now he is a year and half. He is such a sweet little guy when I come home he jumps on to my bed and showers me with kisses. Same with my boyfriend, my mom and his sister. He lives with me and my parents but visits my boyfriend at his house with me on the weekends. When he is walked, alone, or with my boyfriend's mom's dog, and his sister's rescue, he barks at everyone. Joggers, cyclists, and even people just walking by. He is so sweet but I can feel him tensing up and running when he sees people nearing me. I've tried to yell and I scold him with a firm "bad boy I said no barking". It's gotten to the point I have to tighten his leash before we pass anyone or even cross the street. I'm thankful he doesn't bite just barks. I don't know what to do to get him to relax. Also when we're at my boyfriend's house and someone comes in the house all the dogs bark but he doesn't let up. Especially if it's someone he doesn't know or hasn't seen in a while. What do i do?

Can you condense the text into a few key points?
<bot>: Chihuahua barks at everyone that enters the house or he sees when he walks with the exception of immediate family.