dog behaviors explained

explain the behavior of my dog, please ..?

I had my 2 year old female chihuahua about 6 months. She is very sweet, kind, and she did not bark people. While she is my "baby," he likes and gets along well with my husband, except …. Every time he approaches her and I, if we I am sitting and exploitation, growling at him. Or, If I am taking a nap and she is sleeping with me, if my husband is not even close to bed I woke up the sound of growling dog! Why do this?

my dog ??does it too, is a male chihuahua. anyway. she is trying to protect you. =]

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