Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to toilet train a parrot [title] Observe your bird's natural behavior. [step] In order to potty train your bird, you need to pay attention to how it behaves right before it goes to the bathroom. You should also take note of how often it uses the bathroom.

Ending1: Also take note of how often it defecates. [substeps] If your bird defecates frequently in the wild, it may have trouble finding food in its cage. Ending2: The first time your bird uses the bathroom is often the time you want to potty train it. They will often do two or three times a day, or three times every other day. Ending3: [substeps] Remember that an instinctive behavior is to go to the bathroom when your bird has something important to say. If your parrot is unable to pee, is busy with a task, or is urinating especially infrequently, then your bird may be going to the bathroom. Ending4: This way, you will know when to and how often to carry your bird to the bathroom area. [substeps] Most parrots will squat down slightly and flick their tails up when they're ready to go to the bathroom.

Answer format: ending1/ending2/ending3/ending4