If you want to switch food types for your dog, you should do it slowly, because the rapid change of food type can lead to indigestion, diarrhea, vomiting, excessive gas formation or constipation.
The organism of every animal has some harmless bacteria that help to digest food. When the diet is being changed rapidly, the amount of these bacteria will also change, causing their help in the digestion to be inefficient for some time.
That is why you should switch food types really carefully and slowly: the whole process should take 8-10 days when you slowly replace one part of the old food type with the exact amount of the new food type. For the first couple of days, the food should be given in proportions of 75% of old food and 25% of the new food. Then a couple of days of 50%/50%. Then the last couple of days 25% of old food and 75% of the new food.
If the switching process is followed by vomiting, diarrhea or constipation, you should lower the amount of new food.
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