I agree with Tracy. Get this little guy to a vet ASAP. Try to get the bleeding to stop. A cat bite or scratch is very toxic to a bird and rats carry diseases, so if you don't get this bird to a vet right away it will die.
Not trying to scare you but just telling you the true facts.
Nov 01, 2011
Bird attacked by cat or rat by: Tracie
Yes, this is very serious. Please Find an Avian Vet to examine your bird right away. It goes without saying that you need to fix the cage so that the birds can not be attacked again.