Review on Instinct Ultimate Protein Chicken Natural by Elli Navarro

My friend recommended this dry food to me and gave me half a pack. My cat loves it and ate everything every time. After he finished the remaining half of the bag I bought a new £10 bag from Revain. It's the same one my friend gave me. After my cat ate the new one I bought, she started throwing up. My cat is fed up with everything she ate (he only ate this kibble). At first I thought it was normal hairball vomiting. However, in the next two days he vomits after eating this dry food. I can see he is hungry and wants to eat but he vomits all the time. Then I googled and was told not to feed him for 24 hours. After 24 hours I feed him a small amount of this dry food, he vomits again. On the fourth day I took the cat to the vet. They performed several tests, including a blood test to check liver function and an X-ray to see if there was anything stuck in his body. Tests show nothing bad. The vet gave him an injection for vomiting and gave me some kibble to digest. It cost me about $500. A week after the vet visit, my cat stopped vomiting. He ate normal digestive foods and everything looked fine. At that point I started trying to feed him a mix of some of that instinctive kibble with the kibble the vet had given me. Throw up again. Now I'm sure that's the problem with this kibble. My cat has eaten many other brands of dry or wet food and this is the first time she has vomited like this. I chose this Insight dry food because my girlfriend's cat loves it and my cat tried half the pack and everything looks good. I can't say there is a problem with this Instinct kibble but I'm sure there is a problem with the one I bought from Revain. My cat lost 2 kg in a week. I didn't take pictures of him throwing up because I have carpets in my house and every time he throws up he lands on the carpet. I need to clean them as soon as possible. The photos show a vomit patch on my carpet.