Science Diet has a RX food, available only through a vet clinic. And, like all other SD products- it is crap food. Do not be fooled into thinking that BECAUSE a vet recos a food, and it is a RX diet, that it is good.
I know nothing about Royal Canin.
I would get with a nutritionist, and figure out what her allergies are (though chicken seems to be often at the top of the heap with dogs), and go that route.






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