As others before me have, I decided Shadowmist would make a convienent animal companion for a ranger in the party. It also adds to the story I think. But, in deciding to do so, I have traveled down that dark rabbit hole of horses, advanced horses, war horses, animal training, primary and secondary hooves and bites... It seems bottomless. So, in an attempt to extricate myself, I have come to the forum for some input and clarifications.
Shadowmist is a heavy horse, which is a horse with the advanced template, giving it +2 natural AC and +4 to all abilities except intelligence. This gives him str 20, dex 18, con 21, int 2, wis 17, cha 11, with an AC of 15 (+4 dex, +2 natural, -1 size), 19 hp (2d8+10). As a heavy horse he has a bite for 1d4 and 2 hooves for 1d6 each. I decided that Shadowmist was pretrained and therefore came with handle animal combat training. As such, he no longer has docile, thereby making his hoof attacks primary. I calculate this giving him 3 primary attacks on a full attack of +5 bite (+1 base, +5 strength, -1 size) (1d4+5), +5 hoof (1d6+5), and +5 hoof (1d6+5). Is this accurate?
Now, there are noticible differences between Shadowmist and the druid companion house: the ability scores of a druid horse are slightly lower, worse saving throws, and it get a natural AC bonus of +4. I was thinking I would just go with the Advanced Horse stats and ignore the ones for the druid horse.
Once the ranger turns 4th level, effectively taking Shadowmist as an animal companion, do you think I should add the first line of the druid companion table to his stats, or only columns that are missing such as skill, feat, bonus trick, and special? Should I wait until the chart exceeds his stats before continuing with the table?
Your thoughts and opinions are much appreciated!