the G-man wrote:
Has it been established?
I think that's how Michonne used her chained walkers. What other purpose would they serve--or possess some advantage she lacks?
I interpretted it as being the same as smearing zombie guts on yourself, she was using them to mask her savory-ness from other Zombies.
Though it is true as Borgminister and Sojourner have stated that she never did clearly answer why she had her "pets", they could just be her family members she couldn't bare to be parted from, could be why she understand the Governor so well. (I'm leaning towards masking though)
In the Comic one is her brother and the other was her BF, she kept them for three reasons
1. To mask her scent
2. They where loved ones
3. They kept her from having the same crazy visions Rick is currently having.
In the comic both her and Rick carried guilt and saw/conversed with friends and family that were killed.