|75% old | 25% new (days 1-3)|
50% old | 50% new (days 4-6)
25% old | 75 % new (days 7-9)
100% new (day 10)
Frequent changes to your pup's diet aren't recommended but there are times when change is necessary: when your dog goes from puppy to adult, when food allergies develop, if your dog develops a condition that requires a special diet, etc. Generally speaking once you find a high-quality diet that works for your dog it's a good idea to stick with it.
Abrupt changes to your dog's diet can cause major stomach upset and changes should be made gradually; ideally over a period of 10 days. I'll be following the transition formula prescribed above in order to switch Andy to his new diet. Hopefully everything will be smooth sailing and I won't have to deal with too much mushy poop. Have you ever had to pick up mushy poop with a dog poop bag? Trust me, it isn't pretty.