Annemarie, il prodotto che dice Barbara MCH Calcium non contiene vit.D, sono solo ossa essiccate e polverizzate con non so che trattamento chimico.
Tornando a bomba ai gusci d'uovo mi sfugge una cosa.
Tu hai scritto:
Gusci d'uovo (gdu) per il Ca: facile da preparare, li sciacqui sotto un getto d'acqua fredda. Lasciar asciugare all'aria. (ci vuole poco tempo). Macinare nella macina cafè, riducendo in polvere finissimo.
5 gr di polvere/500 gr di carne.
5 gr di polvere di gdu = 5 ml.
1 gdu da all'incirca 7/8 grammi di polvere
poi però hai scritto, in risposta a Corrado:
Citazione da: corrado - 08 Aprile 2013, 15:15:18
Grazie Annemarie ...quindi se il mio cane mangia circa 900gr di carne al giorno, di guscio d'uovo dovrei dare circa 10gr giusto?
Tutto incluso Corrado, carne organi trippa verdure. Se tutto incluso vuol dire 900 gr. i 10 grammi di gdu vanno bene.
Se il guscio non è stato cotto, l'eventuale eccesso di Ca. viene eliminato dall'organismo
Io qui faccio confusione.
La mia mangia 500g di carne (polpa, trippa, organi) al giorno, ma se aggiungo anche le verdure arrivo a parecchio di più. Devo dosare sui 500g di carne o sul totale?
Insomma, 5g o 10g di gdu?
Te lo chiedo perchè anche sulle etichette loro ti dicono sempre il fabisogno giornaliero del cane, mi pare 80mg/kg di peso del cane (nel mio caso fanno 2g di Ca al giorno), però poi andrebbe dosato in base al tipo e alla quantità di carne data per bilanciare il rapporto Calcio/Fosforo che deve essere a favore del Ca.
Scusa ma questo passaggio proprio mi manca e quando non capisco resto nervosa.
Anch'io.
Ti ho gia detto che l'argomento è spinosissimo.
(e lo si evita con l'uso delle ossa polpose).
Per quanto riguarda il gdu ho mandato stamattina una email per avere una volta per tutte dei chiarimenti. Il dubbio mi assilla da sempre, nessuno mi sa dare una risposta esauriente, Vet inclusi. Risposte spesso vaghe e contradittorie.
Quindi porta un attimo pazienza quando mi arriva la risposta, te lo posto qui.
Gdu non cotti (in forno, micro-onde, pentola etc.) in caso di un eventuale sovradosaggio non crea dei problemi, l'eccesso verrà eliminato. (Un sotto-dosaggio invece è molto piu dannoso.)
Tieni presente che il gdu non contiene del F, se non in piccole tracce. Come ben sai il rapporto Ca/F dve essere sempre a favore del Calcio. (Recommended rations for dogs range from 1-to-1 to 2-to-1 calcium to phosphorus.
If calcium and phosphorus are not properly balanced in the diet, the body pulls calcium from the dog's bones to make up for that deficiency, leaving them weakened.)
(e: The
daily nutritional requirements of calcium for an adult dog is listed as 119 mg/ kg of body weight. For an 11 lb dog, that would calculate to approx 595 mg of calcium total, but nutrition can be much more complicated than this suggests as levels of some nutrients can affect absorption of other nutrients. The ratio of calcium to phosphorous is just as important as the the calcium level alone.)
Allora, le verdure e la carne contengono molto F. Aggiungendo un integratore che oltre al Ca. contiene anche del F. in una certa misura, il rischio è che il rapporto Ca/F vada a favore del F.
Proprio per questo, usando un integratore a base bonemeal, bisogna che tu usi quantità differenziate in base al tipo di carne, verdure o trippa etc.
Usando gdu come fonte di Ca. queste precauzioni non sono necessarie.
Quindi tornando alla tua domanda se bisogna calcolare 5g o 10g di gdu (su 500 gr. di carne o su 1 Kg. di carne + verdure) a mio parere è corretto il 10 gr di gdu.
Ti allego questi link + info:
Calcium Supplements
by Christine M. Ruessheim
Calcium supplements come in several forms (calcium salts), but
only part of the calcium salt is elemental calcium.
It is important to know how much elemental calcium a supplement provides because all the dietary recommendations refer to elemental calcium. To calculate how much elemental calcium is in a supplement, multiply the total milligrams (mg) by the fraction of elemental calcium to get total mg of elemental calcium. See examples below:
Calcium
carbonate: = 40% elemental calcium
Example: 500 mg calcium carbonate x 0.40 = 200 mg elemental calcium
Calcium
citrate: = 21% elemental calcium
Example: 500 mg calcium citrate x 0.21 = 105 mg elemental calcium
Calcium
lactate: = 13% elemental calcium
Example: 500 mg of calcium lactate x 0.13 = 65 mg elemental calcium
Calcium
gluconate: = 9% elemental calcium
Example: 500 mg of calcium gluconate x 0.09 = 45 mg elemental calcium
Dicalcium
phosphate: = 23% elemental calcium + 19% phosphorus*
Example: 500 mg of dicalcium phosphate x 0.23 =115 mg calcium + 95 mg phosphorus
*Helmut Meyer/Jürgen Zentek give different values: 21/16
Egg shells: = 39% elemental calcium + traces of phosphorus and trace elements
Example: 500 mg of dried powdered eggshell = 195 mg elemental calcium
Bone meal: = 30% elemental calcium + 17% phosphorus
Example: 500 mg of bone meal x 0.30 =
150 mg elemental calcium + 85 mg phosphorusSome other measures:
1 teaspoon of bone meal = 4 g
1 teaspoon of dicalcium phosphate = 4 g
1 teaspoon of calcium carbonate = 5 g
1 teaspoon of eggshell = 5 g
1 teaspoon of Kitty Bloom Kalac M34 (38-39%)= 5g
1 teaspoon of Animal Essentials Calcium Supplement (34%) = 3g
Mineral Content in
Bones of Ostrich (Struthio camelus var. domesticus)
41,2% Calcium (36,3-45,7%)
16,8% Phosphorus (15,2-18,4%)
0,49% Magnesium (0,35-0,64%)
167 mg Zink (93-287 mg)
94 mg Iron (42-195 mg)
8,5 mg Copper (3,3-14,9 mg)
8,3 mg Manganese (4,6-13,0 mg)
10,0 mg Lead (0,9-56,8 mg)
453 mg Fluoride (290-640 mg)
11,2 mg Aluminium (1,6-20,8 mg)
Mg values are per kg bone ash.Reference: Bissinger Klaus, Dissertation, University of Giessen, 2000
"Quantitativer Nachweis wichtiger Mengen- und Spurenelemente in Serum, Leber, Knochen und Vollblut sowie einige andere Gewebeparameter und Daten von gesunden, südafrikanischen Farmstraussen (Struthio camelus var. domesticus) im Schlachtalter".
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http://www.peteducation.com/article.cfm?c=2&aid=652Calcium and phosphorous are essential minerals in the body. The daily requirements vary depending upon the age and status of the dog or cat. Phosphorous and calcium deficiency and excess can occur and the ratio of calcium to phosphorous (Ca:P) is important.
Calcium
Of all the minerals, calcium is required in the greatest amount. Calcium is essential in the body for many functions including bone formation, blood coagulation, muscle contraction, and nerve impulse transmission. The calcium content of food ingredients varies widely. Bones, dairy products, and leguminous plants contain large amounts of calcium, whereas most cereal grains, meat, and organ tissues contain small amounts.
Phosphorous
Phosphorous is the other dietary mineral required in a relatively high amount in the diet. Phosphorous is required at levels slightly less than calcium. Meat or organ meats are high in phosphorous but relatively low in calcium. Phosphorous deficiency is a significant problem in herbivores and is probably the most common mineral nutrition deficiency present in animals worldwide. However, phosphorous deficiency occurs very infrequently in dogs and cats. In fact, excessive dietary phosphorous which accelerates the progression of renal failure is much more common.
Calcium:phosphorous ratio
Many foods that are low in calcium are high in phosphorous, and in addition, many foods that are high in calcium are equally high in phosphorous. Therefore, providing the correct calcium to phosphorous ratio in the diet can be difficult unless the proper minerals are added.
It is very important that calcium and phosphorous be fed at the correct ratio of around 1.2 parts of calcium for each 1 part of phosphorous (1.2:1).Calcium and phosphorous requirements of dogs and cats
Growth Stage % Calcium in the Diet* % Phosphorous in the Diet*
Peak growth and lactation 1.0-1.8 0.8-1.6
Half grown and last trimester of pregnancy 0.8-1.5 0.6-1.2
Adult non-reproducing 0.5-0.9 0.4-0.8
* on a dry matter basisCalcium deficiency
The calcium:phosphorous ratio is very important.
Calcium deficiency was once a more common disease. It resulted primarily from animals fed diets high in meat and organ meats, which are high in phosphorous and low in calcium. If these animals were not adequately supplemented with calcium they would develop skeletal abnormalities often referred to as rickets. The bone could become soft or very thin and brittle. Fortunately, one of the benefits of commercially prepared and balanced diets, is that except for low calcium levels during pregnancy and lactation, (eclampsia) calcium deficiency rarely occurs any more and switching to a balanced diet can usually correct this problem. Feeding adequate calcium without the correct amount of phosphorous can prevent adequate uptake and utilization of the calcium, thus the calcium:phosphorous ratio is very important.
Calcium excess
Feeding high calcium diets with excess calcium is often blamed for contributing to bone problems in young, rapidly growing dogs. There does appear to be a link between the incidence of hypertrophic osteodystrophy (HOD), osteochondritis dissecans (OCD) and hip dysplasia, and the overfeeding of calcium. In recent studies, researchers fed dogs calcium at a much higher than recommended amount, and compared the incidence of disease in dogs that were fed normal or less than normal calcium levels. As would be expected, the animals that were overfed calcium showed increased incidence of skeletal problems including hip dysplasia.
Many people have embraced these studies and interpreted them to imply that by feeding a puppy food slightly lower in the recommended amounts of calcium and phosphorous to large breed puppies, the puppies will have a decreased incidence of hip dysplasia. However, there are no studies that show that these low calcium foods result in less hip dysplasia in large breed dogs than a normal well-balanced puppy food. While feeding a special formula large breed puppy food to your puppy is not bad, there are no concrete studies that show it is better than a balanced puppy food formulated for all puppies.
Summary
Calcium and phosphorous work together in the body to maintain the growth and structure of the skeletal system. Deficiencies or excesses of both can create skeletal problems especially in young puppies. It is very important that the calcium and phosphorous be fed in the correct ratio. Problems with calcium and phosphorous rarely occur anymore due to the easily available commercial pet foods that are properly balanced. When problems arise, it is when owners feed a homemade diet or over-supplement, especially with young, rapidly growing puppies. There are no studies that show that the new large breed puppy foods reduce the incidence of skeletal problems, but they appear to provide adequate nutrition, and over time, they may be shown to be beneficial.