The treats and foods that are safe will completely depend on what kind of stone she has. Foods that are good for struvite stones are not necessarily good for dogs with ammonium urate stones and vice versa. Struvite stones are produced in alkaline urine, and urate stones are produced in acidic urine.
Once you find out what kind of stone your baby has, we'll be able to help you with foods and snacks
Apples(cut up and peeled) are a great treat
Carrots too