I just got back from an appointment and when I went to check on my chicks, I noticed there was some dark green poop. Could this mean one of them are sick? They're around 5 weeks old and I started letting them outside with supervision for like 15 min each day this past week. Could it be because of the grass they're eating? They've been eating unmedicated starter, some fruits like watermelon, tomatoes, and nectarines (all in small portions just to cool them off because it's pretty hot), and the grass. Just plain filtered water too. They've all been acting pretty normal. Just panting occasionally because of the heat. Are there any other symptoms I should look out for or changes to their diet?