We inject every year for PMV, the bird showed no other signs of ill heath, he always got a dirty wattle when feeding, his droppings were fine and his throat was clear and normal colour, his youngster is also looking really healthy as well, I have caged it just in case so I can keep a eye on it
I may try and use this product this year, a combined vaccine injection for PMV and pigeon pox
http://www.everythingforpets.com/_apos_2_in_1_apos_pmv_pox_pigeon_vaccine.pet/use.id.5.item_id.852.dept.162/
Also I have a cock in the loft that feeds anything that comes near it, I have seen him feed five youngsters on the loft floor, he has a yellow wattle as well