How do you know when your cockatiels beak needs trimming?

You know your cockatiel's beak needs trimming when it appears overly long, crooked, or if it touches the upper or lower jaw when the bird closes its mouth. Additionally, if your bird has difficulty eating or shows signs of discomfort, it may indicate that the beak is too long. Regularly inspect the beak for signs of overgrowth, and consult an avian veterinarian for a professional assessment and trimming if necessary.