I think next to raisins, the girls seem to think yogurt is their favorite food. I've never heard them so quiet when they're eating they're so into it. Just like others have said, heavy and wide dish because they will try to tip it and some even dive right in. I'd swear that they have tongues to lap it up because not a single bit of white is left in the bottom of the dish and when they get to the bottom you hear the 'ting ting ting' of their beaks hitting the bottom getting every last bit out!
I mix mine with alternating ingredients: ground flax seeds (Omega 3's), unhulled sesame seeds (lots of calcium), mashed yam or sweet potato, old fashioned rolled oats (I usually soak them in water overnight before I mix in), sunflower seeds, their regular mash, bananas that are too sweet for me to eat, etc.
Here's a good hint, I've never had to pay full price for big tubs of organic yogurt. I ask the gal who works in that dept. at the grocery store to see if anything is going to expire soon, and then I get it for next to nothing! BTW, pumpkins might still be at stores and are priced to clear out. I got mine for 5 cents a pound! The girls love it plain baked or just raw. I mix in the cooled baked pumpkin with the yogurt too.