Today I finished a pitch and set a tree-anchored belay. Bail slings around this ponderosa, crusty white and molded, held a rapide. My partner climbed up, passed me and did the next pitch. I went to remove the trashed anchor sling, tugged at it to find the knots and the whole doubled-loop setup came loose. It appears that a rodent nibbled clean through the webbing near to two different knots.
Bail sling is cheap and we all like hiking out under our own power. Watch that bad tat and stay vigilant!