not sure on the nose thing, but it seems to apply to mine. Males have fatter thumbs and darker beards. It may not apply until he's about half his adult size or near breeding age. He's gorgeous, his eyes look like they are pointier than most I've seen. My guys eyes aren't pointy at all.

*edit*
His/her nose looks long not short. According to that nose rule, the females have sloping noses like that and males have short flatter snouts.