Here is the viciousness tree. There are four tiers of traits. Your pet begins to collect trait points at level 20 and then every four levels afterwards. Pets get a total of 11 trait points at max level which currently is level 60. As you can see in the picture, all that is visible are the locked symbols. I placed all of the traits on a excell spreadsheet so that they are all clearly seen. This may help you to plan out your pets trait build.
viciousness_tree.xlsx |