Different pets often specialise in one particular assignment with your ranger camp while others are more multi taskers with lower stats in their abilities. Check out my
Pet Statistics Spreadsheet to find out what all the statistics of every pet will be at every level from 8 to 20. The numbers are based on all pets being gray and them having all the relevent amulets equipped for their level. Better to open it in browser rather than client.
If you find an error in any of the figures let me know where it is so i can check the relevent formulas and fix it there are a lot of them.
Which amulets each pet uses was taken from russian mentor site
http://mentor.dclans.ru/new/?page_id=41564