Did you know the most high value treats to use for training your dog is Roast Chicken, Meatballs or even Sausages?
Next on the list is Cheese or Fish Treats.
After that comes Smackos, Liver or Kibble, other than the usual.
The lowest value treats that may not have a great deal of impact are baked treats (but such fun as a normal treat) or their regular kibble.
For lots of training exercises, I poach some chicken breast, and cut into 1cm cubes or even smaller. This appears to be very effective and my dogs are very responsive to all training sessions, while retaining the training they've learnt repeatedly.