This guide helps you compare the power of each type of pet at each level. You will be able to see a cost/benefit ratio so you can get the best pet for your money.
Created by Plus3 at http://celtic-heroes.com/forum/viewtopic.php?f=4&t=86463
Crossposted with permission
With beta underway I minted up a pile of pet tokens and decided to try all colors and tiers of rabbit. My ability started at 282 and finished at 288 so there may be some slight error but here is the table:
Heals
..Brown..White..black..Gold.
1).29.......35.......40.....45
2).56.......64.......75.....85
3).112......132.....151....168
4).188......218.....250....281
5).282......329.....377....424
6).376......439.....501....563
So it seems another way to look at it is by tier
Brown 66%
White 78%
Black. 89%
Gold. 100%
And level
1) 8%
2) 15%
3) 29%
4) 50%
5) 75%
6) 100%
A level 1 brown heals 29hp/pet token (at my abil) while a golden 6 heals 4.4hp/pet token.
If I get some more time I can test across dogs and wolves but I expect this to be the same. Probably with bears too (except they don't use pet tokens)