That is when the sprouts are peaking at their nutritious levels. Bittersweet, Baker's and Dark Chocolates are more toxic than Milk Chocolate. But all the same - do not feed it to your birds. Table salt when fed excessively will cause increased thirst to increase water consumption to increased urination. Excessive amounts of Cooked and Raw Onions can be toxic to your bird.
Onions contain the chemical n-propyl disulfide which denatures hemoglobin.
This will in turn destroy Red Blood Cells. Anemia, Jaundice, Bloody Urine. Be cautious if feeding cooked onion in small amounts. Apple Seeds contain Cyanide. Be sure to always remove apple seeds before giving a portion to your birds.