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Magnesium level of food.

Species: Cat
Breed: ASH
Age: 2-5 years
I have two cats. Casper has urinary tract issues. He is currently on a .085% magnesium cat food. However that particular cat food is being discontinued. I have found a another cat food I like the magnesium level is .01%. Is that too low of a level for him? And is it too low of a level for the normal cat?


Online vet, Dr. Marie

Dr. Marie replied:

We actually don't worry about magnesium and ash levels any more. Back 10-15 years ago this was what we thought was important for cat foods, but there are many more factors to consider.

The most important thing is something called RSS - relative supersaturation. Unfortunately you will only find foods with good RSS levels sold in vet clinics.

If I have a patient with a history of urinary tract issues I always recommend them to stay on a food like Royal Canin s/o or Hill's c/d.

If your vet says it's ok then you can try going to a high quality food like Iams or Science Diet and this is ok for most cats.

---This question was asked in our Ask A Vet For Free section.---


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Disclaimer: Although Dr. Marie is a qualified veterinarian, the information found on this site is not meant to replace the advice of your own veterinarian. AskAVetQuestion.com and Dr. Marie do not accept any responsibility for any loss, damage, injury, death, or disease which may arise from reliance on information contained on this site. Do not use information found on this site for diagnosing or treating your pet. Anything you read here is for information only.

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Dr. MarieDr. Marie is a veterinarian who practices in a busy animal hospital in Ottawa, Ontario. She created Ask A Vet Question as a resource for good, accurate veterinary advice online. Dr. Marie treats dogs, cats, hamsters, guinea pigs, and rats. She has been a vet since 1999.

Is an online vet visit just as good as a trip to your veterinarian? No! But, many times, asking an online veterinarian a question can help save you money. While Dr. Marie can't officially diagnose your pet or prescribe medications, she can often advise you on whether a vet visit is necessary. You can also ask Dr. Marie for a second opinion on your pet's condition.