I would agree w/Dave #30 and Bob/#31 w/ training on live birds -hooded, shackled both on land and water. Usually there are poor mechanics regarding live birds wounded or not , wandering off from the point of impact. Gunners should sluice the bird per previous instructions or judges order the sluicing PRIOR to releasing the dog. I even use clip wings or panty hosed birds capable of walking in heavy cover to teach my young dogs to track. Equally you have to be careful not to overdo this because some dogs might forget to mark and use their nose more and get in trouble.