How do I administer an elimination diet. My questio relates to the proportions I should give my dog.

My dog has an inflamed intestine. Blood tests have indicated ok, x-rays ok, Ultra sound scan has revealled thickened intestine. Vet has prescribed Royal Canin Sensitivity diet. I know that the new food has to be introduced gradually but at what sort of proportion to to his existing food, which is and always has been a premium grade hypoallergic food. I am feeding him 4 x daily at 4 hour intervals. His normal food intake is 200gm/day I initially gave him 75gm RC and 20gm normal result sick. I am now giving him 20gm RC+20gm normal so far ok.

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