This reminds me of the "Uplift War" series by David Brin, very good reading. It could be a better world if we did have more respect for all species even those we eat should be granted kindness and dignity. Legally they may have a tough row to hoe as they would have to show why these certain species are at a different level, at our level. Cockatoos and Amazons have great intelligence and the Too's have mechanical and engineering skills as well. Crows and Ravens are wonderful problem solvers with a sharp intelligence, Honeyguides (passarine birds) have been leading humans to bee trees for centuries to share in the honey found, surely that takes complex thought. Dogs and cats as well can show amazing ability to adapt to situations and save lives of their" pet" humans.