This is definitely a first. I received an email request to help a pet cockerel with an injured leg last night. I've consulted our vets and they said they do not have the medication for chickens, so they'd prefer not to. The best place would be UPM as there is a specialist for chickens there. Failing which, Zoo Negara is also possible, but only with contacts.
If you know of any private vet who can treat pet chickens, do please leave a comment here.