Avocados Persin Bad. Once you cut an avocado, warning signs are easier to determine. If slight pressure leaves an indent in the avocado, it is a sign it has gone bad.

Avocados look amazing, taste great and have plenty of nutritional benefits. This chemical can cause respiratory problems in many birds, including the chicken, and many times it can lead to death in a few days. One avocado has, on average, twice the potassium of a banana.