Free martini is an hormonal dysfunction which affects only females of the specie if they were born from an inbreeding: it causes a large production of testosterone which makes them grow fur and decrease their possibility to reproduce.
Luckily this mutation doesn't seem to bother their health, but they tend to be more aggressive than usual: due to this, they get ATK +1.
The chance to have pups is very low, they have high chance to have none to one pup at max.