Outside of her regular raw feedings (beef, chicken, rice, eggs, etc) Our GSD had 2 loves for treats. Plain yogurt and sardines (in water). Sardines, she would go bananas as soon as she heard the can being opened. Then once the can opened she would sit and not move a muscle because she knew she wasn't getting them if she wasn't calm. Usually just whatever brand was on sale. Wife couldn't stomach that one, so I always handled it.
Plain yogurt was also something she absolutely loved. Kroger Brand or or a name brand was on sale, she didn't care. She would absolutely devour yogurt.
I sure miss her.. just not the same around here without her.