I have a male N. Coloratovillosus, he's completely healthy. Never refuses a meal, in a proper enclosure, actively burrowing. But he is EXTREMELY aggressive. I have another N. Coloratovillosus, but she is a female and is such a sweetheart. They have the exact same setup. He constantly gives threat postures and kicks hairs. It just really baffles me considering I've seen they're usually semi-docile and calm such as my female, my male is the complete opposite. Any feedback would be great!