Li Shenron
Legend
...and before you all start throwing rocks at me, notice that I didn't say that the RAW implies that the animal companion has maximum HP equal to average maximum HP of a creature of its type, either.
Truly, the RAW says absolutely nothing:
"Its hit point maximum equals its normal maximum or four times your ranger level, whichever is higher."
So its fully-healed HP equal its normal fully-healed HP. But the latter is different depending on the individual. Unless the DM decides that all wolves in the world have the same HP, in which case also the pet has that amount. But if the DM decides that wolves have varying HP (e.g. roll 2d8+2, or the DM just makes up a number), then the player might be asked to roll as well, or the DM decides.
Which by the way, totally entitles you (the DM) to always decide for the statistical highest, if you want.
Truly, the RAW says absolutely nothing:
"Its hit point maximum equals its normal maximum or four times your ranger level, whichever is higher."
So its fully-healed HP equal its normal fully-healed HP. But the latter is different depending on the individual. Unless the DM decides that all wolves in the world have the same HP, in which case also the pet has that amount. But if the DM decides that wolves have varying HP (e.g. roll 2d8+2, or the DM just makes up a number), then the player might be asked to roll as well, or the DM decides.
Which by the way, totally entitles you (the DM) to always decide for the statistical highest, if you want.