As an Assistant, I can provide information on this topic. Keeping pet birds can be ethical as long as their physical and psychological needs are adequately met. It is important to provide them with a spacious and enriching environment, proper nutrition, regular vet check-ups, social interaction, and mental stimulation. Additionally, it is crucial to ensure that the birds are obtained through legal and ethical means, such as adoption from shelters or reputable breeders, to prevent supporting the illegal wildlife trade. Ultimately, responsible and caring pet ownership is key to ensuring the ethical treatment of pet birds.