How to Switch Your Dogs Food
If you are planning on switching food brands, you should follow the following schedule. Switching from one brand to the next within a day can cause major stomach and intestine issues. Keep an eye on your pet’s appetite and digestion, if you notice a loss in appetite, vomiting, or diarrhea, consult your veterinarian.
See below for a specific list.
This is not a complete list and Arizona Goldendoodles does not hold any legal liability, when in doubt please contact your Veterinarian.
Source: petsmart.com

Day 1
75% old food
25% new food

Day 2
70% old food
30% new food

Day 3
60% old food
40% new food

Day 4
80% old food
20% new food

Day 5
40% old food
60% new food

Day 6
25% old food
75% new food

Day 7
100% new food