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#61
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Steve Crane wrote: (...) change in diet. When we have carbohydrate free foods that do not contain high levels of minerals known to be a risk, then the risk of following an unproven hypothetical dietary idea is lessened. Yet, if you look at SACN - the home made foods section - the home recipes given are invariably very low in phosphorous, and IIRC, all the diets need additional phosphorous to meet the AAFCO suggested levels. It is clearly relatively easy to produce diets that are low in phosphorous. I'm sure the problem is one of economics, not some mystical barrier to producing a meat-rich diet that is simultaneously low in phosphorous. At the moment the carbophobics are so intense and focused on hypothetical and unproven supposed advantages that they are totally ignoring the downside. For every action there is a reaction - my fear is that in reacting to the carbophobics unoproven claims and hypothetical advantages we are ignoring the "reaction" of feeding high phos foods to a very at risk population of cats. There are no downsides - as long as the owner makes sure to choose a diet low in phosphorous. This is quite possible, given there are canned diets that are both relative low in carbohydrate and phosphorous, etc. (...) contain much higher levels of iodine than veggies or grains. For every action there is an equal re-action. Only if you're, like, moving rocks. Steve. |
#62
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Steve G wrote:
Steve Crane wrote: (...) Consider that renal failure has hugely increased in cats over the past decade. According to Perdue's database renal failure hit 0.9658% of cats in 1980 - in 1990 it had risen to 4.81% of cats and by the year 2000 it had risen to 10.31% of all cats. In a 20 year period renal disease has increased by a whopping ten fold increase. But what's the reason for this? Increased lifespan with a concomitant CRF increase? Or are cats getting CRF at an earlier age than previously? Or is it simply better detected these days, and the underlying incidence of CRF is unchanged? Or is it diet related? Very good questions. Some do believe it's related to diet along with other factors. There was an interesting study done relating to vaccines a few years ago but I haven't heard anything more recent: http://www.geocities.com/~kremersark/acvim_3_2002.html "PARENTERAL ADMINISTRATION OF FVRCP VACCINES INDUCES ANTIBODIES AGAINST FELINE RENAL TISSUES. MR Lappin, WA Jensen, R Chandrashekar, and SD Kinney. From the Department of Clinical Sciences (Lappin), Colorado State University, Fort Collins, CO and the Heska Corporation, Fort Collins CO (Jensen, Chandrashekar, and Kinney). Chronic renal failure is a common cause of death in cats. Lymphocytic/plasmacytic interstitial nephritis is common histopathologically, suggesting immune-mediated reactions may play a role. Feline herpesvirus 1, calicivirus, and panleukopenia virus for use in feline vaccines (FVRCP) are commonly grown in Crandall-Reese Feline Kidney (CRFK) cells. As a consequence, commercially available FVRCP vaccines contain CRFK proteins. The objectives of this study were to determine whether cats inoculated with FVRCP vaccines develop antibodies against CRFK cell extracts and if so, to determine if these antibodies reacted with extracts of feline renal tissue (FRT). Fourteen age-matched, mixed-sex, unvaccinated kittens were divided into seven pairs. To each pair of kittens, one of the following was administered: 10=B5g of CRFK protein SQ; 50=B5g of CRFK protein SQ; 50=B5g of CRFK protein plus an aluminum adjuvant SQ; a FVRCP vaccine for intranasal administration, or one of three FVRCP vaccines for SQ administration. The concentration of CRFK protein used was comparable to the range detected in the vaccines. Kittens receiving CRFK proteins were inoculated every two to four weeks for a total of eight times during the study period and kittens receiving vaccines were inoculated every three weeks for three inoculations. Serum samples were collected prior to inoculation and six months later. ELISAs to detect feline antibodies that bind to CRFK cell extracts or FRT extracts were optimized. All sera were assayed in both ELISAs and absorbance values calculated. An individual cat was considered positive for antibodies against either CRFK cell extracts or FRT extracts if the mean absorbance value of duplicate post-inoculation wells was greater than the mean plus three standard deviations of the 14 pre-inoculation sample absorbance values. None of the cats was positive for antibodies against CRFK or FRT extracts prior to inoculation. All six kittens inoculated with CRFK proteins were positive for anti-CRFK antibodies in the post-inoculation sample; five of these six kittens were positive for anti-FRT antibodies. Neither cat inoculated with the intranasal FVRCP vaccine was positive for anti-CRFK or anti-FRT antibodies post-inoculation. Of the cats inoculated with FVRCP vaccines SQ, five of six and four of six were positive for anti-CRFK antibodies or anti-FRT antibodies in the post-inoculation sample, respectively. Administration of FVRCP vaccines SQ to cats can induce antibody responses to CRFK proteins and feline renal tissues. Further research will be needed to define the role of these autoantibodies in the development of chronic renal failure in cats." Lauren |
#63
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Steve Crane wrote: It is interesting to note that feeding commercial pet foods to wild canids is the recommendation of the American Zoo and Aquarium, Nutritional Advisory Group. This same group also suggests raw meat in "carnivore logs" should only be used for the purposes of administering medication like wormers, enticing animals to move through cages or doorways, and getting the wild canid accustomed to eating commercial diets. That's dogs. Many (most?) other animals may be fed a commerical diet but it is always supplemented to mimic the diversity of the wild diet. For the most part zoos feed a commercial diet. The biggest exceptions are zoos with funding problems who can't afford to do so. I know of several fairly large zoos that feed their big cats raw meat. They may feed commercial diet as well, but raw meat is a big part of the diet. -L. |
#64
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Steve Crane wrote:
Ya know Megan - ya just can't stop yourself from lying can you? =A0=A0=A0=A0Please identify ANYTIME where I EVER made the claim that phosphorus CAUSES kidney disease. snip expected bait and switch and scare tactics I haven't lied and I have never said that you claim phosphorus causes kidney disease. What I have said is that you imply it by posting over and over exactly the things you posted in your response to me, which include scare tactics and implication WRT phosphorus. You know exactly what you're doing and it's on par with a snake oil salesman. You go on and on and use the "excessive phosphorus" catch phrase ad nauseum, yet you still have provided NO proof that phosphorus causes kidney disease in healthy cats or is harmful in other ways. Over and over again you avoid doing so, but you can't have it both ways. Megan "The only thing necessary for the triumph of evil is for good men to do nothing." -Edmund Burke Learn The TRUTH About Declawing http://www.stopdeclaw.com Zuzu's Cats Photo Album: http://www.PictureTrail.com/zuzu22 "Concerning all acts of initiative (and creation), there is one elementary truth the ignorance of which kills countless ideas and splendid plans: that the moment one definitely commits oneself, then providence moves too. A whole stream of events issues from the decision, raising in one's favor all manner of unforeseen incidents, meetings and material assistance, which no man could have dreamt would have come his way." - W.H. Murray |
#65
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#66
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PawsForThought wrote: wrote: And why is it okay for Solid Gold people to come on this ng and not Hill's people?? The only reason Solid Gold posted here (once, mind you) was in reply to Steve Crane the Hills rep's lame (and obvious) attempt at smearing Solid Gold, and for no other reason. Solid Gold stated their reason for posting, and never tried to hide the fact that they worked for Solid Gold (unlike other petfood reps here). Lauren What other pet food reps are here? YOU? I think Solid Gold didn't want to stick around because they would be outed as working for a company that does next to nothing (if anything) in the area of reseach...feline or otherwise. |
#67
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wrote: Steve Crane wrote: Ya know Megan - ya just can't stop yourself from lying can you? Please identify ANYTIME where I EVER made the claim that phosphorus CAUSES kidney disease. I haven't lied and I have never said that you claim phosphorus causes kidney disease. What I have said is that you imply it by posting over and over exactly the things you posted in your response to me, which include scare tactics and implication WRT phosphorus. You know exactly what you're doing and it's on par with a snake oil salesman. You go on and on and use the "excessive phosphorus" catch phrase ad nauseum, yet you still have provided NO proof that phosphorus causes kidney disease in healthy cats or is harmful in other ways. Over and over again you avoid doing so, but you can't have it both ways. Megan Megan, just listen to yourself. You are asking Steve to provide proof that phosphorus "causes" kidney disease in healthy cats while Steve has never claimed that it does. Yet you deny ever saying that Steve has claimed that phosphorus causes kidney disease. Why are you asking him to provide proof of something he has never said that he has done? Dizzy yet? You are trying to have it both ways. For the record (and anyone can check this out themselves), I've never seen Steve state that phosphorus (excessive or otherwise) "causes" kidney disease. So why are you always on his back when he points out that excessive phosphorus (as found in many of the diets YOU recommend) has no positive benefits? I think it is because even you cannot find any good reason to feed excessive phosphorus to cats. Steve has already explained why excess phosphorus in a diet of a cat that is in sub-clinical renal failure is NOT a good idea. Since neither you nor anyone else can predict which cat is going to experience renal disease, it makes sense that excess phosphorus in the diet is a bad idea. |
#68
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kaeli wrote: How do you convert them? That always confuzzled me. As Fed, DMB, and all that. I wish they'd just regulate the stuff like on human food labels. There are four types of nutrient numbers. 1. Guaranteed Analysis - what is required on a bag of pet food. For dogs only Protein, Fat, Fiber and Moisture are required, For cats they add "ash". Guaranteed analysis is virtually worthless. You will find it expressed as either Minimums or Maximums. For example Min 35% protein or Protein - Not less Than 35%%. That means it has 35% protein or maybe 40% or maybe 50% - you really have no idea. It does mean the food must contain at least 35% protein. In the case of moisture and ash these will be expressed in Maximums - Max 10% moisture. Again it could 10% or 5% there is no way to tell. Since you really don't know what the actual level is - converting these values is prone to some error. 2. As Fed Analysis - this is an actual analysis of the actual levels found in the food. Thus the numbers will be 35.4% protein - no minimums or maximums - but actual values - however theses values will always include the moisture in the food and thus must be converted to DMB for comparison to any other food. You can do OK comparing one dry food to another as most fall in the 7-10% moisture level and thus the amount of water in the food isn't going to vary greatly between one food and another. Where you get into trouble is comparing a dry food to a canned food. 3. Dry Matter Basis - this is the actual nutrient percentage after the water is removed and is the best way to compare one food to another as it eliminates the difference that varying level of moisture may have. 4. Kcal basis - usually expressed in grams/100kcals for macro nutrients like protein, fat, fiber. In mgs/100kcals for macro minerals like calcium, phosphorus etc. and then in mcg/100 kcals for very small values like selenium, iodine, etc. This is the "Gold Standard" method of looking at nutrients in a pet food as it takes into account the caloric density and determines how many grams, mgs, mcgs a cat will ingest when meeting daily caloric needs. Converting the values. Converting Guaranteed values is iffy at best but works the same way as converting an As Fed value. Determine the moisture content of the food. Subtract that from 100. Moisture level is 10% Subtract from 100% Equals 90% Now divide any nutrient level by the 90% value. As Fed analysis protein is 20% divide by 90% (90% equals 0.90) equals 22.22% protein on a DMb basis. Canned foods make this more interesting. Moisture level is 75% Subtract from 100% Equals 25% As Fed protein level of 8% divided by 25% (.25) equals 32% protein on a DMB basis. |
#69
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kaeli wrote: The current AAFCO nutrient levels (which manufactures must adhere to) established for cats and dogs for various nutrients dates back to National Research Council data from 1973. We've learned a lot since then. There was a move to change the AAFCO levels and update them late last year but it still hasn't been done. That explains a great deal. Anyone I can write to and complain? Your state AAFCO official - usually somebody in the agriculture department or the consumer affairs department. |
#70
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In article , zuzu22
@webtv.net enlightened us with... You go on and on and use the "excessive phosphorus" catch phrase ad nauseum, yet you still have provided NO proof that phosphorus causes kidney disease in healthy cats or is harmful in other ways. Over and over again you avoid doing so, but you can't have it both ways. He didn't say it causes it. He said it is harmful to cats who are already diseased. Which it is and that's a proven fact. The point he was trying to make (that I also missed until it was clarified) was that, as a kitty guardian, there is no way for us to know if our cats have kidney disease until it is too late. So, since there is no benefit to higher levels of phosphorus in the diet, and IF the cat is diseased (which at only, say, 30%, we can't yet tell) it can hurt the cat, then why take the chance? At least, that's what I got out of it. YMMV, I suppose. -- -- ~kaeli~ Time flies like an arrow. Fruit flies like a banana. http://www.ipwebdesign.net/wildAtHeart http://www.ipwebdesign.net/kaelisSpace |
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