Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to treat polyomavirus in caique parrots [title] Notice if the parrot has a loss of appetite and low energy. [step] One of the symptoms of polyomavirus is that the bird will stop eating and have low energy. It may appear depressed and lethargic.

Ending1: [substeps] Often, birds will stop eating to lessen their symptoms, but this is not usually the case with polyomavirus. New birds with polyomavirus may experience lethargy or decreased energy, as well. Ending2: [title] Check if the bird has persistent abdominal weakness or resistance to movement. [step] This may also result in an unwillingness to stand or to close its eyes in order to heal. Ending3: Take your bird to the vet right away if your parrot suddenly has mood swings. [title] Notice any changes in the bird's mood. Ending4: It may also have rapid weight loss due to lack of appetite. [substeps] The infected parrot may also vomit or regurgitate its food back up when it does eat.

Answer format: ending1/ending2/ending3/ending4