No onions and I think Greek yogurt is not good for them, it has higher something then regular yogurt(I can't remember what right now). Apple Cider Vinegar is good for the PH in the pee, so it doesn't turn grass brown. Apples with no seeds, seeds are poisonous. Stay away from milk.
Misty- Samoyed Mix, Tannor- Golden Retriever CGC
Robyn- GSD CGC, TC, Midnite-GSD CGC,TC, Brennan-Golden Retriever CGC, Batman-Husky/Greyhound , Apollo-GSD