HM, given the difficult nature of the WotBS series, are you sure you want us to roll HP, with how the dice tend to mess with people?
And as for my eidolon, I had it marked as average HP (kinda being NPC/monster style), but shall I continue as such, or roll for it (if you insist on rolling)?
Here's the info for Barrik's new level. I will update the post sometime later, probably after I get an answer on the HP questions.
[sblock=Barrik Level 2]
+X HP.
BAB +1, Will Save +1 (total base +3)
Gain Bond Senses class feature.
+1 Handle Animal, +1 Knowledge (arcana), +1 Knowledge (religion), +1 Ride, +1 Use Magic Device.
Eidolon gains 1 Evolution point, spent on Scent ability, in addition to other benefits of increased HD.
Gain 1 more 0-level spell known (Message), 1 more 1st-level spell known (Rejuvenate Eidolon), and 1 more 1st-level spell/day.
[/sblock]