How to change Guinea pig dry food without upsetting their tummies?

Rather than using a 50/50 mixture for a diet transition, I would instead ideally recommend starting 75/25 old/new food for 2 days, 50/50 for another 2-3 days, then 25/75 old/new food for another 2 days. Chloe is more likely to experience gastrointestinal upset without the more gradual transition. That said, it is possible that she could be perfectly fine with a more consistent 50/50 transition over 7 days. If she does not normally have a sensitive GI tract, you can try a 50/50 mix for 7 days, but if she does develop signs of a GI upset (vomiting, diarrhea, loss of appetite), a more gradual transition will be necessary. I hope this helps clear up any confusion!

I recommend giving 3/4 of the old food and 1/4 of the new food for three days, then give 1/2 of the old food and 1/2 of the new food for three days, and then give 1/4 of the old food and 3/4 of the new food for three days. After this you should be able to fully transition onto the new food.

You can switch their food but you want to slowly transition them to the new food. This means you want to start with mixing only a small amount of the new food in with the old food for a few days then over a 10 day period, increase the amount of new food while decreasing the amount of old food until you are just feeding the new food around day 10. By slowly transitioning them to a new food, it decreases the risk of causes an upset stomach. I hope this helps!

If you are wanting to switch Kiko to a new food the best way to do it is to transition him slowly from the old food to the new food over about a period of one week. I usually recommend doing about 25% of new food to 75% of old food for 2 to 3 days then increasing that to 50-50, then increasing it 2 to 3 days later 75% new to 25% old and so on. By the end of 7-10 days you should be able to successfully start them on the new food without any problems. Signs to watch out for that can indicate a food intolerance to the new food include vomiting and diarrhea/soft stools. Good luck.

It's recommended to do it gradually over a period of 1-2 weeks, you need to mix the new and old food, start with a small amount of the new food the first few days and gradually increase the amount of the new food and decrease the amount of the old food.

Yes, it is always good to gradually change over to a new diet rather than doing it abruptly. I usually recommend a period of about 5-7 days to switch food. Start with 25% new food, 75% old food for 2-3 days, then increase the ration to 50:50 for a few days, then further increase it to 75% new, 25% old for a few days, then 100% new food. I hope the diet change does the trick for Z. Best of luck. Let us know if you have any additional questions!

Yes, you are correct that dog formulated food is much better for him than what you are correctly feeding. His current diet is not nutritionally balanced for him, and will not provide the nutrients he needs to be health. You are correct that you should give him a little bit more each day, as that will help prevent GI upset from switching food. Gradually increase the amount of Ivory Coat and decrease the amount of his current diet until he is eating the Ivory Coat only.