Small culinary amounts generally safe. Large amounts or concentrated mustard can cause GI irritation.
Mild GI upset with large amounts
Small amounts in prepared food OK. Avoid concentrated mustard paste/powder.
Cherry pits, stems, and leaves contain cyanide. The flesh itself is not toxic but can cause digestive upset.
Spinach contains oxalates which can cause kidney issues in large amounts.
Macadamia nuts are toxic to dogs. The exact mechanism is unknown, but they cause neurological and muscular issues.
Almonds are not toxic but can pose choking hazards and cause digestive issues.
Walnuts, especially moldy ones, can contain tremorgenic mycotoxins that cause seizures.
Peach flesh is safe but the pit contains cyanide.