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Cat food - which have the lowest phosphorus? Paging PhilP

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Juls - 17 Jul 2005 23:44 GMT
PhilP, are you out there? I know you know a lot about feline nutrition,
and really could use your input.

In reading and talking about Dmitri's CRF, I'm seeing the controversy
over whether or not low protein diet is the way to go. But the one
thing is clear...the lowest amount of phosphorus seems to be crucial.

Isn't there a listing somewhere of the phosphorus levels in commercial
cat foods? If so, does anyone have that link.

Otherwise, which are the cat foods out there with the lowest amount of
phosphorus.

Right now, he's eating the Hill's KD chicken flavor canned, and he does
like the dry KD. (Though I don't usually feed them dry food other than
having some on hand for emergencies, such as getting snowed in)

I'm also wondering if I should get some liquid potassium supplements?
His vet said his potassium was okay (only the BUN and creatine numbers
were elevated, and I'm working on getting a urine sample to them). But
over the last year, twice it seemed his back legs gave out. I
attributed that to his ongoing arthritis and overall aging, but now I'm
worried it might be a symptom. Both times were when he jumped off the
bed. I'm in the process of making him some handicap steps because he
really likes curling up on the bed with Jack.

TIA,

Juls

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Helen - 18 Jul 2005 00:57 GMT
> Isn't there a listing somewhere of the phosphorus levels in commercial
> cat foods? If so, does anyone have that link.

http://webpages.charter.net/katkarma/canfood.htm

http://webpages.charter.net/katkarma/dryfood.htm

They are linked to from my site too.

> I'm also wondering if I should get some liquid potassium supplements?
> His vet said his potassium was okay (only the BUN and creatine numbers
[quoted text clipped - 4 lines]
> bed. I'm in the process of making him some handicap steps because he
> really likes curling up on the bed with Jack.

I wouldn't, no. Not every CRF cat has low potassium. I'd only supplement if
potassium is 4 or below. It could well be the arthritis, although there are
several possible other causes of weak back legs in CRF cats:

http://www.felinecrf.org/symptoms_treatments_index.htm#W

HTH

Helen
Juls - 18 Jul 2005 02:21 GMT
Thank you so much Helen. Your site has been an absolute godsend to me!!!

> > Isn't there a listing somewhere of the phosphorus levels in commercial
> > cat foods? If so, does anyone have that link.
[quoted text clipped - 23 lines]
>
> Helen

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Phil P. - 18 Jul 2005 04:49 GMT
> PhilP, are you out there? I know you know a lot about feline nutrition,
> and really could use your input.
[quoted text clipped - 12 lines]
> like the dry KD. (Though I don't usually feed them dry food other than
> having some on hand for emergencies, such as getting snowed in)

I think k/d is too low in protein for all but mid to end-stage CRF cats.  I
wouldn't restrict protein until the BUN reached 60-70 mg/dl.  Protein
restriction can exacerbate or cause anemia by reducing hemoglobin
production.  It can also impair immunological responses and reduce the cat's
resistance to infection, and also cause muscle wasting.  I've seen dramatic
turnarounds in our CRF cats after switching them to x/d.  Even though x/d
has more protein than k/d, their BUN *decreased*!  X/d is very similar to
k/d except for protein, and the phosphorus is a little higher- but still
acceptable.  Like k/d, x/d also is not acidified- which is very important
for CRF cats.

Petguard Turkey & Rice, Rabbit, and Venison are also very low in phosphorus-
even lower than k/d according to Petguard's analysis.  Wysong Chicken
Gourmet is also low in phosphorus and would be my 3rd choice after x/d and
Petguard.

> I'm also wondering if I should get some liquid potassium supplements?
> His vet said his potassium was okay (only the BUN and creatine numbers
> were elevated, and I'm working on getting a urine sample to them). But
> over the last year, twice it seemed his back legs gave out. I
> attributed that to his ongoing arthritis and overall aging, but now I'm
> worried it might be a symptom.

I *definitely* recommend a potassium supplement.  Many CRF cats that have
normal serum potassium levels have *decreased* muscle potassium and total
body potassium stores.  A total body deficit of potassium can develop well
*before* the onset of hypokalemia.  So: even though your cat has normal
serum potassium levels he can still have deficit in his total-body potassium
stores.  You would want to keep his serum potassium levels in the *upper
half* of the normal range to prevent hypokalemia and further renal damage
during intracellular redistribution.

The usual beginning dose of potassium is about 2-4 mEq/day/cat divided into
2 or 3 doses.  In my experience most CRF cats need between 1 and 4 mgEq/day
to keep the serum potassium levels in the upper half of the normal range.
You can adjust the dose based on serum potassium levels.

Remember, CRF cats drink a lot and form more urine rapidly and urinate more
frequently.  Rapid urine formation *promotes* potassium excretion.
Therefore, potassium supplementation is *crucial* for CRF cats.  I've read
studies and also seen for myself renal function *improve* in CRF cats after
potassium supplementation.

Both times were when he jumped off the
> bed. I'm in the process of making him some handicap steps because he
> really likes curling up on the bed with Jack.

Rear leg weakness can certainly be caused by low muscle potassium even
though serum potassium levels are in the normal range.  Remember, less than
5% of the total body stores of potassium are contained in the blood- the
rest, about 95-98% is contained in the tissues. So: serum potassium levels
is not an accurate assessment of total body potassium stores.

Best of luck,

Phil
Juls - 18 Jul 2005 06:15 GMT
Thank you, Phil. This is fantastic info and so helpful.

One question: who makes the x/d? Okay, two questions...do you recommend
a particular brand of potassium?

> > PhilP, are you out there? I know you know a lot about feline nutrition,
> > and really could use your input.
[quoted text clipped - 69 lines]
>
> Phil

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Phil P. - 18 Jul 2005 06:46 GMT
> Thank you, Phil. This is fantastic info and so helpful.
>
> One question: who makes the x/d?

x/d is a Hill's prescription diet intended for the prevention of calcium
oxalate.  Hill's g/d is another good alternative to k/d.

Okay, two questions...do you recommend
> a particular brand of potassium?

I use Tumil-K powder mixed in the food.  1/4 teaspoon contains 2 mEq
potassium gluconate.  Don't start potassium therapy without consulting your
vet.  Serum potassium levels must be monitored to avoid hyperkalemia.  If
your cat is urinating normally or more than normal he probably won't develop
hyperkalemia- I've never seen hyperkalemia in a CRF cat that was polyuric.
Nevertheless, his serum potassium levels should be monitored to make sure
they stay in the upper half of the normal range.

If your cat is receiving SC fluids, the doses will have to be adjusted-
probably upwards.

Best of luck.

Phil

> > > PhilP, are you out there? I know you know a lot about feline nutrition,
> > > and really could use your input.
[quoted text clipped - 69 lines]
> >
> > Phil
Helen - 18 Jul 2005 13:50 GMT
> Thank you, Phil. This is fantastic info and so helpful.
>
> One question: who makes the x/d? Okay, two questions...do you recommend
> a particular brand of potassium?

What is his current potassium level exactly?

Helen
Juls - 18 Jul 2005 17:08 GMT
> > Thank you, Phil. This is fantastic info and so helpful.
> >
[quoted text clipped - 4 lines]
>
> Helen

I don't know. I did specifically ask about it, because I'd remembered
something about potassium. She just said it was in the normal range. I
have to get a urine sample and take it back, so I'm going to ask for a
copy of his results. And I won't start him on anything until I discuss
with his vet.

He's starting to revolt on the KD already, so I'm going to have to find
alternatives.

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Phil P. - 20 Jul 2005 12:01 GMT
> > > Thank you, Phil. This is fantastic info and so helpful.
> > >
[quoted text clipped - 13 lines]
> He's starting to revolt on the KD already, so I'm going to have to find
> alternatives.

I used to recommend Innova Lite canned because it was very low in
phosphorus, however, in June of this year Innova reformulated their diets.
Innova Lite canned now contains a whopping 390 mg of phosphorus per 100
kcals- 1.61% phos on a dry matter basis- .37% phos. as fed.  *Much* too much
phosphorus for a renal cat- or *any* cat for that matter.

Don't laugh- after the Purina takeover of Friskies and Fancy Feast the
quality of their diets and phosphorus levels of some diets have dramatically
improved.

Phil
Juls - 21 Jul 2005 04:20 GMT
Ouch, that's a disappointment about Innova.

I have to correct something I said previously. I said Petco carried Pet
Guard. Wrong. I went there today to get some, and it's Pet GOLD they
carry. So I'm going to have to do an online order to get more food.

On the Hill's XD, is that likely to taste any better than the KD? He's
really tired of it already. (He refuses the reg flavor, but will eat
the chicken and the dry, though I'm trying not to feed too much dry)
And do I just ask my vet for it? I don't want to sound like I'm second
guessing her. I really do like her a lot.

> > > > Thank you, Phil. This is fantastic info and so helpful.
> > > >
[quoted text clipped - 26 lines]
>
> Phil

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Phil P. - 21 Jul 2005 05:01 GMT
> Ouch, that's a disappointment about Innova.
>
[quoted text clipped - 3 lines]
>
> On the Hill's XD, is that likely to taste any better than the KD?

Yes. x/d contains more protein and a little more phosphorus- both improve
palatability.  Feeding x/d now will help him adapt to k/d much easier later
in life.

He's
> really tired of it already. (He refuses the reg flavor, but will eat
> the chicken and the dry, though I'm trying not to feed too much dry)
> And do I just ask my vet for it? I don't want to sound like I'm second
> guessing her. I really do like her a lot.

Just tell your vet you have a friend that recommended x/d because he had
very good results with the food in his renal cats and tyhat you'd like to
try it.

x/d is also a Hills prescription diet.  Petsmart (at least in my area) now
sells prescription diets, but you'll still need a script- which you can
obtain from the veterinary concession right in the store.  Just bring a copy
of the blood test results or they might try to talk you into more bloodwork
before writing the script.  Or just ask your vet to write a script and fill
it at Petsmart.

Phil

> > > > > Thank you, Phil. This is fantastic info and so helpful.
> > > > >
[quoted text clipped - 26 lines]
> >
> > Phil
PawsForThought - 18 Jul 2005 13:39 GMT
> Petguard Turkey & Rice, Rabbit, and Venison are also very low in phosphorus-
> even lower than k/d according to Petguard's analysis.  Wysong Chicken
> Gourmet is also low in phosphorus and would be my 3rd choice after x/d and
> Petguard.

To the OP, if you have a Whole Foods Market in your area, they carry
the Petguard brand.

Lauren

See my cats:  http://community.webshots.com/album/56955940rWhxAe
Ajanta - 18 Jul 2005 16:38 GMT
: To the OP, if you have a Whole Foods Market in your area, they carry
: the Petguard brand.

How are Whole Foods' prices compared to Petsmart etc? Any expereince
with Trader Joe's house brand cat food? Thanks.
PawsForThought - 18 Jul 2005 18:01 GMT
> : To the OP, if you have a Whole Foods Market in your area, they carry
> : the Petguard brand.
>
> How are Whole Foods' prices compared to Petsmart etc? Any expereince
> with Trader Joe's house brand cat food? Thanks.

I'd imagine that you'd probably pay more for the Petguard at Whole
Foods than another food at Petsmart.  As far as I know, Petsmart does
not carry Petguard.  But the way I see I'd rather pay more for the
food, then to have vet bills from a food that might cause problems.
I've never used Trader Joe's housebrand but maybe someone who knows
about it will post.

LAUREN

See my cats:  http://community.webshots.com/album/56955940rWhxAe
Juls - 18 Jul 2005 18:47 GMT
Petco carries PetGuard, though I don't know if they carry those
particular flavors. I'll be checking it out. But I know they carry the
brand, because I've bought it before and the boys really like it. (But
that was sardines and various fish, which is their thing - it's going
to take some prodding to get them to like poultry and game)

I've used Pet Food Direct a lot as well (they carry Wellness, which is
the only place I can get it), and have had very good experiences with
them. They also frequently send out 25 percent off coupons, and that
really cuts the prices.

> > : To the OP, if you have a Whole Foods Market in your area, they carry
> > : the Petguard brand.
[quoted text clipped - 12 lines]
>
> See my cats:  http://community.webshots.com/album/56955940rWhxAe

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blkcatgal - 19 Jul 2005 04:31 GMT
My Petco does not carry Petguard foods.  I order mine from waggintails.com
or petfooddirect.com

Sue

> Petco carries PetGuard, though I don't know if they carry those
> particular flavors. I'll be checking it out. But I know they carry the
[quoted text clipped - 23 lines]
>>
>> See my cats:  http://community.webshots.com/album/56955940rWhxAe
 
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