Hi yes i wouldnt think the dodgy tummies is down to the grass or turkey growers if im rearing chicks and turkey poults they all eat the same food i think its better to rear birds on grass if you can. But as lewis says just keep an eye on them you dont always see blood in poo for coccidiosis symptoms are hunched up ,sleepy ,no energy,head shaking,yellow poo with or without blood and generally looking unwell but yours dont sound like this you could always get some herban and add that to the water i love the stuff leanne