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Kirkland Cat Food Reviews
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I would consider myself as an "expert" of sorts on cats, as there is seemingly no one that can truly claim that title. I currently help house, raise, and assist many rescue cats (more than 10). Most cat owners know what a debacle it can be to change foods midstream in a cat's life. The inevitable horrific change in the smell of the stool, the vomiting, the diarrhea, and other not-so-obvious things. We, like others on this thread with dogs, have both used and recommended Kirkland brand premium dry pet food for an extended period of time. As of approximately September of 2022, something changed in the food.
At first, we attributed the change to a possible cold or other variant in the ecosystem. Then as time moved forward and after ruling out as many things possible, we cannot come to any other conclusion other than the food quality has changed. The stool from the cats has the unmistakable foul odor of a "cheaper" food change. The overall health of the colony has shown signs of degradation as well. Fur, skin, overly-frequent vomiting, and other vile digestive problems are in evidence. It is currently unclear if the abasement in ear health and sneezing is related at this time. Once a change is made it will be easier to assess these issues.
At the current time, we are sitting on the last bags (as we buy in bulk) of the remaining. We are now considering making an extremely expensive change to the core food we feed our adopted children. It should be very interesting for us and the rest of you concerned cat lovers what occurs when the change is made. I will attempt to update the status of our situation at that time.
So at first I thought one of my cats was I’ll. But then all my cats got sick the only thing different was that cat food. My cats don’t go outside or around anything. I immediately took it back and my cats are no longer vomiting.
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Ugh, I purchased this food for my feral cats however, recently I introduced my 4 cats to this food and they love it. My 14 year old Maine Coon started vomiting a lot and I assumed it was because of his long hair. Just recently, he started smelling really bad. He's been leaving urine marks which he's never done and now we are taking him to vet tomorrow. Hoping it's not a blockage but he's never been sick like this until I started with this food. I am so regretful this happened. Please stay away from this food. I'm not even feeding this to the outdoor ferals any longer.
My 9 year old cat became seriously ill from eating Kirkland dry maintenance cat food. She started vomiting, losing weight. She’s had fluids, nausea med, and on prescription food now. It’s a nightmare.
This is the only food my male cat has ever been fed at our home, for the last 3-4 years (he’s about 5 now). Yesterday my poor cat was in a lot of pain, I had to rush him to the hospital and he needed emergency surgery. The radiology report showed that he had bladder stones, or crystals in his urinary tract. It was completely blocked. In surgery they removed several stones from his bladder and urethra. The Kirkland food seems to be the common link among hundreds of other complaints here. He is still at the hospital recovering. But once we bring him home tomorrow there will be NO Kirkland Cat Food allowed in this house.
I have been feeding my cat Kirkland cat food for at least 3 years. He usually had the Light blue bag. I bought the Dark blue by accident. For 2 weeks I fed him the Dark Blue Kirkland and he just kept vomiting it up and he had diarrhea. I went back to Costco and bought a bag of the Light Blue cat food. His usual food. He continued to vomit and experience diarrhea. He lost weight, didn't groom himself properly, and had no energy.
I bought a bag of Whiskas and he ate it. He did not vomit. He did not have diarrhea. He put the weight back on and looked and acted healthy. I still have the 2 bags of Kirkland food, which I did not want to go to waste, so I added about a tablespoon to his bowl of Whiskas. Once again he Vomited and had diarrhea. I don't know if the formula has changed, the factory changed, or the food was somehow contaminated, but the problem is Definitely with the Kirkland Cat food.
I alternate between this bag and the Damon bag for my two Maine coons, one of which has a voracious appetite. Got really strange lately when he started sniffing it and turning away. He had severe runny yellow diarrhea during the weekend. And has started throwing up. The other one doesn’t get poop issues but now also has yellow softer poop. I fed them canned food and they devoured that instead. NOT feeding them this again and will be complaining to Costco. I know Kirkland had melamine scandal in 2012, with this happening again is inexcusable. Considering never buying Kirkland pet food again.
I’ve used Kirkland maintenance cat food for my 7 cats and they loved it. But the last bag I recently purchased wasn’t being eaten as fast as normally. I started noticing throw up all around and diarrhea outside of their boxes. I also noticed that they were very lethargic and losing weight. I talked with my neighbor friend who also has cats and uses the same cat food for her cats. She said her cats had very smelly diarrhea and were laying around real quiet, not being themselves. We both determined it was the good and stopped feeding it to them ASAP!! I put them on a different pet store brand and they are all doing much better. I don’t know what is happening with Kirkland brand, but it’s NOT OK! I’m taking the remainder of it back to Costco Tomorrow and letting them know.
I bought this cat food for our 13 yr old cat who was seemingly healthy. He didn't like it, but I thought he would get used to it. A few months later he was vomiting bloody liquid and we rushed him to the vet. She tested his organs and said everything appeared good and said it was his diet. Because of the extreme problem, he wouldn't eat and they suspected more of an issue so did more tests. It appeared we were going to have to put him down as they explored the origin, suspecting cancer. After "jump starting" his appetite, using anti-nausea pills and meds to keep his stomach acid reduced, we finally got him started on another diet. He is recovering, but it was a very expensive lesson that won't be repeated.
I have been feeding Kirkland Signature Maintenance Cat Chicken and Rice Cat food for years now without any issues at all. I have two cats that are hearty eaters and generally not picky. I put the food in their storage bin and they feed at will. I purchased a bag recently when the bin was getting low and added. I found it odd that the food was going down extremely slow compared to regular. Then about 2 weeks ago our usually very shy male cat was very lethargic and had made a mess outside of the litter box. Inside the litter box there was a mess as well. He had diarrhea and was not feeling well. I thought maybe he had a virus cause he seemed a little better the next couple of days.
My female cat which has been looking a little chunky lately is clearly loosing weight. Both cats have lost a lot of weight of late and are not eating this food. Then today another incident and mess. I was ready to take the male to the vet since it seems that there maybe something more than a virus at work here. Then on a whim I googled Kirkland Cat food problems and found that I was not alone on the same issues with this food. A BAD BATCH!! I dumped what was left of this food which was most of the bag and am contacting Costco to inform them. Sadly I didn't keep the bag which has the date code on it.
Kirkland Cat Food author review by Dr. Ken Tudor
Kirkland knows cat owners sometimes worry about the food they give their four-legged friends, which is why it developed a food that meets a cat's special nutritional need using ingredients that cat owners can trust.
Contains probiotics: Probiotics provide good bacteria that live in the digestive system, and they help keep cats healthy by balancing out the bad bacteria.
Human grade: Kirkland cat probiotics are all human-grade, which means they are processed under strict human-grade standards and are free of harmful pathogens and other contaminants.
Specially designed formula: Kirkland Cat Chicken and Rice Formula is designed to meet the special nutritional needs of cats. It also has a balanced amount of protein and fat to keep a cat's body in top condition.
Indoor cat formula: Indoor cats can become overweight, which is why Kirkland Signature Super Healthy Weight Indoor Cat Formula helps indoor cats keep at a healthy weight with a lean body condition.
For different stages: Kirkland Cat Food products are balanced for all life stages, which means they are suitable for kittens and adult cats.

A recognized expert and leader in pet nutrition, Dr. Ken Tudor has written over 200 articles on the subject. He also has a featured weekly blog on petMD, is published in major veterinary journals and is a frequent internet media guest expert. He is the founder of Hearthstone Homemade, a recipe and supplement program for pet parents wishing to feed nutritious homemade dog food.
Kirkland Cat Food Company Information
- Company Name:
- Kirkland Cat Food
- Website:
- www.kirklandsignaturepetsupplies.com
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