As'Salaam Alaaykum
This is pretty old..but yeah the cat was trying to bring her friend back to life i think, resusitation is what was being taken place i think. But it's really sad that the cat missed his/her friend, i hope they unite in Jannah, but i'm not sure if animals have a hereafter.. It's amazing how the creatures of Allaah have such feelings..i've noticed with some animals that no matter how annoyed you get with them they come back with love and no revenge, and they are patient masha'Allaah. Indeed Allaah is the most mercyful and those who are mercyful to his creation is indeed beautiful!
Jazakallaahu Khaayr.