5/3 Taz, AMPS 197, +4.25-126, +9-180, PMPS-178

SaraMV

SaraMV

Member Since 2022
No one has answered on the main forum, so I thought I'd try here. I have been following the Dr Pierson carb list since January. I'm finding some contradictions between it and the Scheyderweb calculator, and I'm not sure if I'm using the calculator correctly?

Am I supposed to look at the dry matter percentage? If so, is there any other calculations I need to add? The calculator is showing that Friskies pate is medium carb instead of low carb. Friskies pate (4-5%) is all that I feed unless I need "medium carb", which then I've been feeding friskies prime filet (14%). But when comparing the dry matter of different flavors, both the pate and prime filet is showing 12%. :confused:

https://www.felinediabetes.com/FDMB/threads/5-2-taz-amps-189-2-228-5-165.262766/#post-2945201
 
Dr. Lisa’s list is a good place to start but it’s dated. Use a carb calculator. Tanyascrf has a more recent list but it’s kind of difficult to navigate because it’s in order of phosphorus levels and not every food has the carbs listed.
 
You do need to look at the Dry Matter Carbohydrate % when looking at Carb Calculators.

Dr. Lisa's website uses "As Fed" data that she collected from cat food manufacturers. The labels on the cat food cans contain the Guaranteed Analysis which is only a range of values (max, min). To that extent there will be some difference but it can't be 10%.
 
I kept thinking I was using the calculator wrong as well. But I'm sure you're doing it correctly. Like I said purina has had huge shakeups the last several months. Ingredient shortages causing them to change formulas...and also according to an article Elise read some places were making substitutions and not disclosing on the ingredient lists.

Figure if they are doing to our pets food what is happening to ours scary for all of us!!??:nailbiting:
 
SaraMV said:
dry matter percentage
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You can but then you need to follow the formula in this post -

Bandit's Mom said:
Dr. Lisa's website uses "As Fed" data
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This is not quite right - Dr. Lisa uses the Typical Nutrient Analysis (TNA) - it says it at the top of the chart - I believe TNA is the same as Metabolized Energy (ME). With that said, the TNA is not the same as the As Fed profile (or the Dry Matter one either).

In summary, you are interested in how the % of the calories that are carbs and only the TNA or ME will tell you that. Weruva, for one, posts the ME profile (so no math needed! hurray!) though a lot of companies don't (but you can get the As Fed or DMB values and do some math).

If you need or want help calculating the % carbs, let me know - I built the formula in that above link into an SS.

:cat::cat::cat:
 
JaxBenji said:
This is not quite right - Dr. Lisa uses the Typical Nutrient Analysis (TNA) - it says it at the top of the chart - I believe TNA is the same as Metabolized Energy (ME). With that said, the TNA is not the same as the As Fed profile (or the Dry Matter one either).
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Hi Stranger! :-)

I can now see how my post could have been misinterpreted. I didn't mean that Dr. Lisa's carb % is on an As Fed basis but that she used As Fed data that she collected from cat food companies in her calculations. I think As Fed and TNA are the same thing.
 
Bandit's Mom said:
Hi Stranger! :)
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:bighug::bighug::bighug::bighug:

Bandit's Mom said:
she used As Fed data that she collected from cat food companies in her calculations. I think As Fed and TNA are the same thing.
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No :) she asked food companies for TNA data. She goes into As Fed vs DMB vs TNA here - it's very similar to Marje's post though still a lot to digest. If you look on Jax's ss, I have a tab with Marje's formulas in it and you can see how to plug in the AF or DMB data in order to get the % of calories that are carbs (or the TNA/ME data for carbs). I have this SS in a version where you can make a copy and save to your own SS - just shoot me a note if you want the link.

<< scritches to bandit >>
 
JaxBenji said:
you need to follow the formula in this post -
:cat::cat::cat:
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This is amazing! Thank you so much! I saw several different calculators online and none of them gave me anything close to Dr Lisa's carb list. I've been feeling really guilty, thinking that I've been feeding Taz medium carbs for the past several months. I have a lot of homework to do today, to find the carbs in some unknown flavors. :)
 
JaxBenji said:
You can but then you need to follow the formula in this post -


If you need or want help calculating the % carbs, let me know - I built the formula in that above link into an SS.

:cat::cat::cat:
Click to expand...

I have been sitting here for almost 30 minutes, trying to figure out how to find carbs in one can of food using the info you provided. I feel soo lost! Can you please show me in mathematical equations how I would find the carbs (like Dr Lisa's) in this food?

Protein - 8%
Fat - 5%
Fiber - 1%
Moisture - 82%
Ash - 3.5%
Taurine - .05%

I came up with 2% as an answer, but the flavor is in savory gravy, so I'm guessing it's a lot higher in carbs. On the Scheyderweb calculator, it tells me that the dry matter for this flavor is 3%.
 
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SaraMV said:
I have been sitting here for almost 30 minutes, trying to figure out how to find carbs in one can of food using the info you provided. I feel soo lost! Can you please show me in mathematical equations how I would find the carbs (like Dr Lisa's) in this food?

Protein - 8%
Fat - 5%
Fiber - 1%
Moisture - 82%
Ash - 3.5%
Taurine - .05%

I came up with 2% as an answer, but the flavor is in savory gravy, so I'm guessing it's a lot higher in carbs.
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Injust plugged this into the carb calculator minus the taurine since there is no spot for taurine. It is 3% dry matter carbs. I'd be curious if by using this formula above if its same
 
I'd say this is fairly accurate since we both got same answer. I've never had an issue with this particular calculator. Now I still would want to know what it come up with on the one Susanne has created too:)
 
First I added protein, fat, fiber, moisture, and ash together. It gave me 99.5 as an answer. I deducted that from 100, so carbs should be .5?

Next I did the following...
Protein 8 × 3.5 = 28
Fiber 5 × 8.5 = 42.5
Carbs .5 × 3.5 = 1.75

28+42.5+1.75=72.25

Carbs 1.75 ÷ 72.25 = .02 or 2%
 
SaraMV said:
First I added protein, fat, fiber, moisture, and ash together. It gave me 99.5 as an answer. I deducted that from 100, so carbs should be .5?

Next I did the following...
Protein 8 × 3.5 = 28
Fiber 5 × 8.5 = 42.5
Carbs .5 × 3.5 = 1.75

28+42.5+1.75=72.25

Carbs 1.75 ÷ 72.25 = .02 or 2%
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That looks right...I'd say that its between 2 and 3% respectively. Since it's still not a perfect science
 
Rainbow Conti said:
That looks right...I'd say that its between 2 and 3% respectively. Since it's still not a perfect science
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Doing the above formula, I'm getting the same results from the sceyderweb calculator. It's showing me that my "4%" is actually 14%. I sure hope I'm missing something.
 
SaraMV said:
Protein 9
Fat 5
Fiber 1
Moisture 78
Ash 3.5
Taurine .05
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Ok I'm getting 16 on the scheyderweb calc. If you got 14 using formula I'd say that one is accurate between 14 and 16% that needs to be your mc.

ETA...the taurine number is not needed. The calculator has no spot for it it doesnt figure in at all
 
Rainbow Conti said:
I agree...but if you're getting a 14% using the long math and the calculator is coming up in same range it has to be right
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I went back and reread all the posts. Then I did a search on here and read through those. I finally went to the links and reread them again too. I am feeling much better about what I'm feeding after reading about the TNA versus dry matter or As Fed %. I would still like to know what a couple of flavors are, but I guess I'd need to contact the companies to find that out.

Very informative article and kinda scary too, considering how far off the counts can be.

https://catinfo.org/commercial-cat-foods/#Composition
 
SaraMV said:
I went back and reread all the posts. Then I did a search on here and read through those. I finally went to the links and reread them again too. I am feeling much better about what I'm feeding after reading about the TNA versus dry matter or As Fed %. I would still like to know what a couple of flavors are, but I guess I'd need to contact the companies to find that out.

Very informative article and kinda scary too, considering how far off the counts can be.

https://catinfo.org/commercial-cat-foods/#Composition
Click to expand...
This is why I went raw. I didnt like all the uncertainty. Raw isnt for everyone so no judgement everyone has to do what works for them. But I'm a serious control freak...lol
 
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