Krishnagar, Feb. 12: Thousands of families in the bird flu-hit blocks of Nadia run the risk of not getting the Rs 500 the government has promised as they had not reported the death of their backyard chickens. Tahamina Bibi had lost 15 chickens a fortnight before the flu was confirmed in Tehatta on January 19. She ate some and threw the rest in a field. The resident of Kanainagar, about 160km from Calcutta, is not sure if she would get the money as it will be difficult for her to prove the deaths.