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Not AvailableThe effects of post-hatch (PH) feed deprivation (FD) for 6, 12, 24 and 36 h were assessed on performance, gut development and differential expression of gut associated genes in slow-growing broiler chickens. A significantly higher (P=0.001) yolk sac weight was observed in all the FD chicks. The residual yolk sac of 24h and 36h FD chicks had a higher ether extract but lower protein content than that of control (immediately fed) chicks. The relative weights of the proventriculus, gizzard, intestine, liver and pancreas were lower in 24h and 36h FD chicks. The 36h FD chicks had lower (P