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You will want to introduce it slowly. A BARF diet can be added in with regular food until the kibble is phased out. If you switch too soon, you will some GI upset.
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Take a look at these two sites and let me know if you still have questions.
I think that's the best idea. Raw diets are a good bit of work. BARF also stressed the fact that domestic pets should not be vaccinated so it has it's drawbacks in my eyes.
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