"Born out of love, blinded by glee,
Innocent, pure, magic and free,
Faithful, trusting; often naive,
Soft, furry; their hearts hold a key."
Sometimes it can happen that it got another fur color. Just add white fur if that happens.
If you want to give it the infamous Braum mustache you HAVE to use the white fur tag. Otherwise its fur will turn also brown.
In rare cases there will also be a tail which is weird since no training image contained one. So if you want to prevent it from happening add tail as negative. (Although Poros indeed can have a small tail.)