Just checked how it works and it's scaled according to gamespeed and to a tag in CIV4HandicapInfo.xml, <iAnimalEscalationTurnsElapsed>. So that in Noble, an animal gain +1

every 60 turns. I think the

cap should be function of the base strength rather than an absolute value, though so that wolf could be capped at +50% (6?).
I think I might increase the time needed to enhance strength by 1 point. 60 seemed fine at first, but might be too much. Some reduction in max enhancement (3? 4?) can be a good idea, too.
On the other hand, is it really so strong? Hunter with a bit of experience can kill an elephant easily and it is one of the most powerfull animals.
All this mechanics is meant as a way to make animals more competetive. They are strong at first, but later get wiped easily.
It works for wild animals only. So not so easy to exploit.
Also, if you have beastmasters/rangers to capture the animals and yopur enemy does not have anything to defend from the few animals that survived long enough to become strong and be captured then, you would win anyway.
More options problems in .24 -- about half of the ones that GameOptionsInfos says should be visible are not displayed. Possibly related is the absence of the Fellowship of Leaves.
Also, I had a wild Wolf come into my territory. However, it did not attack and eventually left.
Mine display fine I think, but will check that again when I can.
Some options are just hidden and turned off by default (save for flavour mod).
I thought that there are so many options that it is really messy, so decided to hide some of the rarely used ones (or used all the time). All are still in and can be accessed by gameoptioninfos.xml - a really easy file to edit.
I always try to add new options at the end of the list not to mess the ones that are higher on the list...

Unfortunatelly, I changed the order of options compared to FfH - there were some hardcoded ones and some problems caused by it it FfH, so I decided to keep close to BtS order.
Another problem are people that ignore my installation instructions - if I ask to run one game in play now mode, I do it for a reason. Another option is to disable saving game options and world settings and I will not do it (but Kael, tired of explaining it over and over, already did).
That happens if your borders expand over an animal.
I like seeing strong animals... it makes being allied with them worth something.
Thank you

Animals can also wander into the borders of animal friends, and then into other borders I think. But that does not happen much.
Uhm, I'm missing the civilopedia entry for Amurite Battle mages i wrote some time ago....
Sorry, forgot to link it in the unit description. Fixed.