Dobielover,
You are correct that I needed sources, unfortunately I don't have a computer at the moment, only a phone. When I try to leave the page to get my source from any other window it reloads the page and I loose my entire typed message. I have tried the "save draft" button, but as far as I can tell that does nothing.I have typed it up 3 times now only to loose it again. In the process though I decided I should probably stop blowing this poor persons thread up with an unintentionally highly debated topic only loosely related to his problem. The main point of everything is was trying to say was ironically exactly what you have been doing anyway. Also saying that you should statistically have had egg binding is not accurate, since I gave no statistic for rate, and you are not giving ONLY the 20% feed.
1. Don't feed ONLY straight 20% protien feed for long times, even the companies that make it advise against this. If you are going to feed it to them at all make sure you give extra calcium to help counter, and ideally at least free range. Both of these are advised by the companies that make them, and what they are promarily designed for.
2. "Snacks" and treats are OK and even beneficial in 30% or less of their total food if they are healthy things like greens, bugs, beans and not grains and fruit.
3. Commercial feed actually is not made of good quality ingredients and can cause damage long term if that's all they get.
4. While chickens are like toddlers and eat what tastes good first, if given only high variety nutritious snacks and free range their body will self regulate and help ensure a complete nutrition. An important part to this is to remember that when they eat things like bugs or beans (or even a junco??!) They arent actually getting 100% protien, most of those are at most 30%, with added calcium and fat too which both help deter ketoacidosis. Also free ranging hens actually eat more greens (which are surprisingly high in calcium) than protein sources.
5. If you give high nutrition snacks (inculuding a better protein source like beans, bugs, or bone in fish) and free range in addition to Commercial feed you will probably find your chickens lay and live longer. (Which Dobielover showed)
I am going to see if I can type up a more complete essay on the sources, methods, and why's of all of this (including the egg binding). I will have to type it in a different place then copy it over and start in a different thread. If i can get it I will edit this thread and post the link. It might take me a few days though.
Sorry, completely forgot that I was supposed to respond to this.
1a). There is NO published study suggesting 20% CP is harmful to poultry over any time period. A substantial minority of us on BYC, perhaps even a bare majority, routinely feed out birds at least 20% CP all their lives. There are a poorly sourced claim, one I have repeated myself, that CP over 24% is bad for growing waterfowl, particularly Pekin ducks, who have been bred in ways similar to the Cx, encouraging rapid weight gain (muscle development) at rate faster than the skeletal and system and tendons develop, leading to "Angel Wing" - but its poorly sourced. Mass carbs are much more strongly linked to the condition, particularly in their formative weeks. High CP is associated w/ various health conditions where chickens are used as human analogs in health studies "High CP" being in excess of 36%.
1b) Makers of 20% CP "All Flock" formulations do not, in fact, recommend you feed less than 20% some of the time. The point of all flock is every age, every gender, all the time.
1c) The push for lower Protein comes from commercial production, who seek to minimize costs in a business of extremely narrow margins. Protein, particularly animal protein, is expensive. 16% CP is adequate, on a typical corn/soy diet, to obtain acceptable egg production in the first productive year
for commercial layers, in commercial management conditions. With appropriate amino acid supplementation, primarily dl-Methionine and l-Lysine, CP levels of 14 and 15% are adequate to that purpose. The EU remain at the cutting edge of that research. This is because CP is used as quick reference (See
@McChooky 's comment above for a quick gloss) by the largely ignorant, for what we are really interested in - the amounts of certain limiting Amino Acids - Methionine, Lysine, Threonine, Tryptophan. AAs chickens can not produce adequate amount of on their own, and must obtain through diet.
1d) Ca metabolism is essentially independent of Protein digestion and repurposing of amino acids into useful new proteins. the Ca : P ratio is FAR more important. Adding Calcium won't "buffer" excess CP, it will do damage to your birds over the long term - how much damage is a factor of age, dosage, gender, duration, frequency of lay, and size of egg.
2.) Sources???? The
10% rule of thumb is just that, a thumb rule which is quite conservative because the things often offered as treats (sunflower seeds, dried mealworms, etc) tend to be high fat sources - its own health risk. You said: "
healthy things like greens, bugs, beans and not grains and fruit". These things are NOT interchangeable. Even Millet isn't interchangeable. White (proso) millet has a significantly different dietary profile than red (Indian) millet, and differing antinutritional concerns as well.
3a) Assumes facts not in evidence.
Nutritionally inferior, poorly stored, and age degraded commercial feeds aren't great, but the majority are still nutritionally superior to the typical "home brew" feed recipe. Of course, some very expensive niche commercial feeds are also nutritional [dog excrement] - but they are targeted at the ignorant human keepers who have money to burn and can't be bothered to take the time to do the research. More expensive != better. It may. Often not.
3b) The same concerns in commercial feeds are ALSO concerns in home brew feeds made from ingredients intended for human consumption. The risk is perhaps lesser - but when you buy that grocery store bag of dried beans, read the label real close.
4a) You are brushing up against some studies (l
inked in this post) which show that with adequate variety, chickens are reasonably good at managing their energy intake and CP needs. Those same studies show that chickens are only passable at balancing their AA intake, particularly once they've met their dietary energy needs. They are, however, quite good at regulating Ca intake. We'll call this "half right".
4b) anyone that thinks that anything is "100% protein" is an idiot. I assume you didn't prop that straw man up simply to bash it. A rare steak is typically around 75% water. Meaning that 85/15% meat/fat ratio is only the describing the non-water portion - 21% protein by weight.
4c) Free ranging is great - but its not magic. The value of free ranging is seasonally dependent, determined in no small part by the variety of the pasturage, and may still be deficient in key (often trace) minerals,
of which selenium is a concern for big swaths of the US. I do it myself. As a supplement to a nutritionally superior commercial feed, not as a "cure" for a nutritionally inferior feed.
5) Close - but that will take unpacking and a post as long as this one to address. There are a lot of factors in play there.