I have had best success with hatchery turkeys starting them with layer chicks, I get ISA Browns. They do seem to learn to eat better with chicks to show them the way, but in order to keep the feed in there I use the layers as the meat birds will soon overeat and they make the brooder too messy. The conflict with meat birds and turkeys in feed IMO is that the chicks would be best suited to either a low protein continuous feed or the higher protein taken out for hours as mentioned, both systems work well. Turkeys need the higher protein constantly in there. With layer chicks they don't need the higher protein but they can tolerate it. When the turkeys are eating well and the brooder is looking too messy or crowded they get separated into 2 areas to continue in their own feeding program.
Sorry for your losses. Do try and get the remaining turkeys eating, they need teaching unlike the chicks who will try to eat anything not nailed down as soon as they leave the egg.