If you want to change your dog's dog food, here are a few steps to consider: First, make sure the new dog food is appropriate for your dog's age, size, and health. If your dog has any special dietary needs, such as a disease or allergies, you should choose a dog food specifically designed to address those needs. Slowly mix the new dog food into the old dog food. You can start with a mixture of about 25% new dog food and 75% old dog food, and then gradually increase the proportion of new dog food every day until it is completely replaced with new dog food. Doing this can help your dog adjust to the new diet and avoid cases of indigestion or diarrhea. Make sure the dog has enough water. Dogs will need more water as they adapt to new dog food, so you should ensure that your dog has an adequate supply of water. Observe the dog's reaction.
If the dog develops indigestion, diarrhea or other abnormal symptoms after adapting to the new dog food, stop using the new dog food immediately. And consult your veterinarian. Remember to keep your dog's diet regular. The dog's diet should be kept regular and frequent changes of dog food should be avoided as much as possible.