I don't think her chewing up toys is related to her anal gland issues, but definitely watch her and make sure she is not getting into anything that can hurt her. Does she have lots of outlets that she CAN chew on? Like raw bones, bully stick, yak chew?
About the anal glands, you want her poop to be firm enough press on and express the glands. It could be she has a intolerance to chicken and is not digesting it well (fairly common among k9). When my 1st pup was a baby, we were feeding him Royal Canin (thought we were doing the best), but he always had mushy poop and developed anal gland issues. The problems disappeared when we switched his food to a higher nutritionally dense food (Fromm) and his poops were solid.
I feed my current pup Acana and have had no issues with mushy poop.