Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to groom a cockatiel [title] Provide a small dish for the bird to clean itself. [step] Birds often enjoy bathing themselves and keeping clean. Offer your bird a small dish or bowl filled halfway with lukewarm, chlorine-free, filtered water.

Ending1: Place wet feet in the dish and fill it halfway with your wet hands. Allow your bird to handle this dish for up to 15 to 20 minutes. Ending2: Try your best to mimic this pet's favorite behaviour. [title] Use a feather comb to brush the cockatiel's hair. Ending3: This will be your bird's' water' during the day. [substeps] Besides ensuring your bird stays hydrated, it also protects it from illness and especially from cuts to the body. Ending4: Use a ceramic bowl; the heavier weight will prevent the bird from spilling it or knocking it about. Remove and clean the dish when the cockatiel has completed its grooming routine.

Answer format: ending1/ending2/ending3/ending4