Interpreting a Chronicle

[Darrell Impey UK]

Looking over a recently received Chronicle, I'm pretty sure that I'm reading it right, but I'd appreciate a second opinion please. (Or third, or fourth...)

OK the Chronicle in question comes

from:

Pathfinder #70 Reign of Winter: The Frozen Stars

.

Quote:

Spoiler:

Wolliped Wrangler

: You may take a

Spoiler:

Wolliped

... as a loyal mount or companion. If you possess a class feature that permits you to take an animal companion or mount that progresses as an animal companion, you may add the

Spoiler:

Wolliped

to your list of legal and available companions.

Starting Statistics: Size Medium; Speed 50 ft.; AC +1 natural armor; Attack gore (1d6); Ability Scores Str 14, Dex 16, Con 12, Int 2, Wise 11, Cha 4; Special Qualities low-light vision, scent
7th-Level Adv.: Size Large, AC +3 natural armor; Attack gore (1d8); Ability Scores Str +4, Dex –2, Con +4; Special Abilities spit, trample (1d6)

Let's say that I want to apply this to a 1st level Cavalier due to the mount options. The creature in question starts off a medium, but grows to large once the character reaches 7th level.

Now, the APG says, "The creature must be one that he is capable of riding and is suitable as a mount. A Medium cavalier can select a camel or a horse. A Small cavalier can select a pony or wolf, but can also select a boar or a dog if he is at least 4th level. The GM might approve other animals as suitable mounts."

Clearly the Chronicle is the equivalent of the GM approving another animal, so that's fine. But how does it interact with the size requirements, given that it starts at medium?

Would it be limited to small races?
Could a medium race take it as long as they took the Undersized Mount feat from the ACG?
Would a medium character have to start with a horse and them dismiss and change at 7th level?

My belief is that the feat will cover it; which could then be retrained when the mount grows. But as I said, I'm looking to hear opinions.

Many thanks.

[BigNorseWolf]

Id go with rai and add it to the list.

[John Compton]

The boon would just add the creature to the list of legal animal companions, much like a cavalier PC who receives the [[Spoilered below]] boon could take that creature as a companion even if it were not yet large enough to ride.

Quest for Perfection:

Axebeak

[Darrell Impey UK]

Thanks for the quick responses. :)