redesinging fetradden and ca'avisi to be more weird and hot, respectively

fetradden have always been too "literally just a horse furry" for me so i'm doubling down and giving them long mouths that open to the back with bigger tusks because honestly that's just HOT to me

ca'avisi are getting shark faces so they're now SHARK-axolotl-tiger-scorpions, which makes them way hotter and more bangable which is important