Canadian Brand. Great Jack's Freeze-Dried Dog Treats are grain-free and 100% made and sourced in Canada. The low-temp freeze-dry process locks in the flavour and nutrients. These 100% beef liver treats provide a single protein source with no artificial colours or added flavours. They have high palatability and are suitably sized for training, rewarding, and food toppers. Great Jack's Freeze-Dried Treats are high protein and low calorie. They're great for all breeds, sizes and ages of dogs.