vit K is what is most often advised for rat poison in birds (however there are different kinds of rodenticides so please review the info in the second link):
http://www.birdcageoutlet.com/bird-safety/article-household-toxins.htm
(Dr. Jeanne Smith, DVM Avian Health Services )
"....Rodenticides. The most commonly used rodenticides are anti-coagulants. Clinical signs of toxicosis may be bleeding from the mouth, nose, or vent, bruising. Treatment consists of treatments of vitamin K1..."
http://www.merckvetmanual.com/mvm/index.jsp?cfile=htm/bc/213000.htm
MERCK veterinary manual (poultry)
Reviews several commonly used rodenticides and gives exact treatment measures
general info on rodenticides and pets:
http://www.petalk.com/poisons.html
(excerpt)
"....Rodenticides are classified according to both their basic ingredient compounds and by how they act on their target. These categories include: Anti-coagulant rodenticides, cholecalciferol, strychnine, zinc phosphide, bromethalin, compound 1080 and more. The most common rodenticide poisoning seen in veterinary practice is that of the anti-coagulant rodenticides. These poisons - with ingredient names like warfarin, fumarin, diphacinone, bromadiolone - act by interfering with the animal's ability to utilize Vitamin K. One of they key roles of Vitamin K is in the production of coagulation factors in the body which cause blood to clot when necessary. Although we are not aware of it, normal physiological processes require blood to clot many times a day in our bodies and that of our pets. Without the necessary coagulation factors, normal minor bleeding in the body goes unchecked which, without treatment, becomes major bleeding, with blood loss anemia, hemorrhage and death resulting. With most anti-coagulant rodenticides, signs are not seen until 3-5 days after the pet has ingested the poison. Clinical signs include weakness, difficult breathing, pale mucous membranes, and bleeding from the nose. Other types of rodenticides have different mechanisms of action with some (i.e., strychnine and bromethalin) causing neurological signs such as incoordination, seizures and others cardiac failure (i.e., cholecalciferol). If accidental ingestion of rat poison is suspected, contact your veterinary clinic immediately, even if your dog or cat is showing no obvious signs of being ill. Be sure, if possible, to bring the poison container in to the clinic in order to determine the specific toxin and provide the best treatment. Early recognition is critical as some poisons, particularly the anti-coagulant rodenticides, can be successfully treated if the poisoning is caught early and treated appropriately. ..."