Strong ammonia odor from litterboxes, how to figure out which cat?

Cataria

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During the past two weeks, I have noticed a strong ammonia odor coming from my litterboxes that causes a burning sensation in my eyes. I have not changed the type of cat litter or cat food.

My family thinks the issue is the number of cats -- I have 11 (10 females, 1 male, and all are fixed), but I also have three litter robots that clean the litterbox to a tray underneath every seven minutes, and two regular litterboxes that I used to manually scoop once a day but now do 2-3 times a day since the smell issue started, even though there's not really much in them. I never had this problem in the four months I've had this many cats, but the 6 kittens are now a little over 4 months old -- would the kittens getting bigger make that much of a difference in the smell, from even 3 months to 4 months?

I have also tried completely replacing the litter in the two regular litterboxes (haven't gotten around to the litter robots yet), and although it initially seemed better, it's starting to hurt my eyes again after only 3 days. For those that have a lot of cats, could 11 cats really cause this, especially when the litterboxes are regularly scooped?

My biggest concern is that the change is not from number of cats or kittens growing up, but that it is an actual health issue, that one of the cats is dehydrated, or has an UTI, or kidney problems, or one of the many other things that could cause a high amount of urea in the urine that could lead to the stronger ammonia smell and burning sensation. None of my cats are acting any differently, and they are all using the litterbox normally. I have not noticed any of them eating or drinking more or less than usual.

I've tried shutting a single cat in a room with the litterbox one at the time and seeing if it smells like ammonia, but I'm not getting consistent results. I think it's because urea doesn't turn to ammonia right away, and also because my sense of smell is subjective. Is there are better way, like some sort of at-home test or special cat litter I could use when separating the cats to narrow down which cat might be the issue if the smell is health issue-related, and then take only that cat to the vet? I would love some suggestions on what route would be the most cost-effective, or easiest to do, or more likely to give an accurate result.

Thanks so much. Any suggestions on how to narrow down which cat (if it is a single cat with a health problem causing the issue) or how to reduce the smell (if it isn't health-related) would be appreciated!
 

melinda davidso

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Is there a chance one of your cats might be diabetic?

Is it possible to see if one of them is drinking more water than usual or see if one of them is acting "off"?

With that many cats, this may be tough to figure out. 

Good Luck 

curious to see what you find out 
 

darkhorse321

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I wouldn't worry about the smell. I have found that in the humid days of summer, I can get an eye watered ammonia smell when cleaning out boxes. Humidity for some reasons holds onto odors---with cat boxes to horses stalls. Also, if the area your box is in(kitty box) has low ceilings, that will also cause a trapped odor (Same for horses stalls too). in the heat.

Baking soda will reduce the odor and some kitty litters are more absorbent than others. Remember in a multi cat household, kitties can pee on top of other pee, which will add to a strong ammonia scent.

Hope that helps!
 

LTS3

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Is there a chance one of your cats might be diabetic?
Diabetic cat urine doesn't smell like ammonia. It smells very sugary.
 
Humidity for some reasons holds onto odors---with cat boxes to horses stalls.
I agree
Hot humid weather makes urine smell a lot more than usual. I don't notice it with the cats but with my mice, their bedding has a strong urine odor just 2 days after the box has been cleaned out. In the winter the bedding hardly smells between cleanings.
 
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Cataria

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Thanks all. It has been very hot and humid lately, and I know the temperature of the room the litter boxes are has been 75-90 degrees F, so that could be why I'm suddenly having the problem now when I didn't have it before! The good news is I do have an air conditioner, just haven't gotten it put in yet. Once that happens, I am very curious if that will fix the problem. I've also started adding baking soda to the litter. :)

As for healthwise, I haven't noticed any of them acting differently or drinking/eating more or less, but for piece of mind more so than anything else, I still want to be sure they don't have any issues. I actually ordered Vetstix 11 Urine Test strips, which I can supposedly use to test their urine. It is supposedly arriving at my house today, so hopefully I can start collecting urine samples and seeing if any of them are having issues and need a vet visit. Wish me luck?
 

lanie

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I agree with Darkhorse.  We have 7 cats and the more humid it gets, the worse the ammonia smell can be.

In the last 6 years I have had this many cats, however, I have only have about a dozen occurrences where smell was a problem for me.  I love my cats, but can't stand the smell of cat urine.

We have 5 cat litters, that are cleaned at least once a day.  I also throw a litte baking soda in as well.  One friend said she uses Arm and Hammer pet deodorizer, but I haven't tried it yet, the baking soda seems to do the job.  I only have a problem with one of my cats.
 
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Cataria

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Just an update!

I used the test strips and tested 6 of the 11 cats, for them, all looks normal.

I have pretty much narrowed down to the issue to two things:

1. The humidity, as everyone has said! I finally got my air conditioner installed, and it has done wonders for the problem. Now I only have the strong odor when I am actually cleaning the litterbox, not throughout the house.

2. The cat litter I was using. I switched to this different cat litter about three months before I started having the issue and didn't notice a problem at first, but it may have been because the kittens were originally much smaller. After switching back to the Fresh Step for a box, it's very clear that the 4Paws I was buying isn't doing the job like the Fresh Step was! I managed to get the 4Paws to work almost decently by adding some zeolite, but when the cost of the zeolite plus the litter approximately equaled the Fresh Step, I figured I might as well saved my sanity and go back to the Fresh Step.

Problem solved, theoretically. I'll know for sure once all my litterboxes are replaced with Fresh Step again. Thanks all! :)
 
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