So I'm a little confused as to how effective the green and brown chrysalis are

-Can you use more then one at a time on a wolf or will it only count one for 20 steps?

-Can you use one on each wolf within the 20 steps or only on one?

-can you use both cocoons on a wolf?

I'm just wondering cause I decided to use 3 each on my wolves and didnt really notice much difference... then again it's only +9 if all 3 stacked so maybe I wouldn't have noticed a difference?