kibby is a white bully, so she gets this black gunk underneath her nose rope and sometime some other brown gunk in between a couple of her wrinkles... i have tried everything to analyze what makes this happen and what doesn't... its impossible.. weather, food , dirt, i dont know..

but from looking closely at it, it almost appears as if it is dead skin that gets dry and scabby and then breaks off and collects in her wrinkles... so i figure just as long as it is "dry" then its ok, i often brush it out with a dry towel, then clean with wet, then dry again.. i do this every few days or once a week, otherwise her face will get to irritated so i figure if its not bothering her, maybe its just the way she is.

Mine has a similiar Roll and It's always red underneath it, but it does not smell etc.

I just assume that is how it will always be as a result of her face etc. I just try to keep it clean in there, and look at it as part of her character.. I wish it would go away but not banking on it.

I have a black bully, so the face actually wouldn't show it if was dirt, it's more a redness of the fur itself oddly.

I think it depends on the weather, ie:  heat vs cool, also if they play alot outside.  She sweat under there so I always use baby wipes every couple of days just to check her out.  then dry it with a paper towel.