Hi!
Pet abilities have a specific number of moves duration that is given in the pet tab in your backpack in the pet capabilities section, for example:
Average frequency of capability use -
7 moves <img src="http://warofdragons.com/images/icon_char_diam_question.png" title="" style="font-family: Tahoma, Geneva, sans-serif;" />
Pets make a hell lot of difference in fights based on the skill they use and that u can look up in the capabilities section. And well rested pets have higher and better frequency of skill use. There rest period is also available to view in the pet section of ur bag. Talking about the colour of the pet, here is the same skill of two different pets, one green one grey, both of the same level:- http://warofdragons.com/artifact_info.php?artikul_id=5264 and http://warofdragons.com/artifact_info.php?artikul_id=5413.... As you can see yes the colour makes a huge difference so upgrade ur favoured pets to the max! i havent yet started out much on rangers quests, when i do i'll let uk the pet usage there. the only thing i know is its expensive but worth it, with the right pet. THANKS! and happy hols