The FCR generally indicates the capability of the animals in utilizing the feed for their growth and survival.

In my opinion feed conversion or feed efficiency (being the inverse) is nothing more or less than the relation between body weight gain and (apparent) feed intake of an animal or group of animals in a certain situation over a certain time period.

FCR generally refers to the ability of animals to benefit from feed and turn it into production .

FCR is related to the animals ability to convert the feed they consumed. FCR shows the feed utilization in animal's body. It's the ratio of feed consumed by animal with the animal body weight. For example, if the FCR value is 1.3, it means we need 1.3 kg feed to get 1 kg animal body weight.

FCR or Feed conversion Ration is the value/ratio which has been obtained by dividing the quantity of feed consumed in g by the body weight of birds in g

3400g/2000g =1.7 is the value of FCR where 3400g is quantity of feed and 2000g is the amount of body weight gain

It applies to the animal/ subject to the question. It is genetically controlled to a moderate extent. More the palatibility, and more the conversion will result in good efficiency due to genotype x environmental interaction. It differs from species to species.

Feed conversion ratio implies the rate or how best the feed is utilized to body weight gain. It is the ratio of feed intake to the weight gain. It signifies the amount of feed consumed in relation to weight gain

It clearly applies to animal because FCR for the same feed varies from animal to animal and different feeds have different FCRs for the same animal.

FCR actually applies to both animal and feed and it is affected by animal factors such as digestion and metabolism which in turn are altered by animal app., type, physiological state , health etc. From the feed side it is affected by a host of factors such as nutritive value or the

Le FCR s’applique à la fois à l’aliment et à l’animal. La FCR mesure la qualité de l’aliment (quantité consommée pour 1 kg de PV) et l’aptitude de l’animal à valoriser un aliment riche.

The FCR measures the ability or the efficiency which the animal body converts feed into the desired output. Both animal and feed factors effect on the conversion efficiency.

Feed conversion as its name implies, refers to feed and basically refers to the amount (lb or kg) of feed that is needed to produce one unit (lb or kg) of an animal product (weight, egg). It is calculated by dividing the unit of food / unit of product. This parameter does not have a unit of measure. Feed efficiency is the proportion in which an animal can convert feed into a product and is calculated in an inverse way (unit of product / unit of feed). This relationship can also be expressed as a percentage, that is, if we have a feed efficiency of say 0.70, then the animal can convert the feed into a product, with an efficiency of 70%. If we exchange the values ​​of feed and consumption, then a feed efficiency of 70% equates to a feed conversion of 1.43 (1.0 / 0.7), in other words, to generate 700 grams of product, I require 1,430 g of feed. The feed conversion parameter is more commonly used in farm production, while feed efficiency is a more frequent term in research work. It is worth mentioning that the maximum feed efficiency and the best feed conversion coincide at 1.0, but in the case of feed conversion, it worsens as it increases and in the case of feed efficiency, it worsens when it decreases. In both cases these parameters are of little use, if you do not have a frame of reference such as the weight at which the feed conversion is calculated, since naturally the feed conversion increases as the weight increases, that is, the animal becomes more inefficient as it approaches its adult weight, so a feed conversion to a weight (eg in pigs, 2.38 to 120 kg of weight is an adequate feed conversion, but the same conversion to 100 kg is excessive). On the other hand, in practical conditions at the farm level, both conversion and feed efficiency can be affected by different factors such as feed waste, mortality, nutrient density of the feed, an inadequate record of the feed consumed or even the theft of food, so these factors must be considered to establish a real parameter.

According @mahgoub EI, FCR in an animal can be influenced by both animal and feed factors.

However, FCR is less concerned with what a feed does to an animal. FCR is more of what an animal makes of any feed consumed.

So I feel that feed factors are silenced when calculating FCR.

Referring to no. (Ii) of the main question, feed does not convert itself, so "feed can't have FCR". I think feed factors such as digestibility, palatability etc. can only affect an animal's FCR.

I stand to be corrected Sirs and Mas

The question is that what is digested the feed or the animal? .what is palpable the feed or the animal ?. By answering the questions , l think you will agree with me that FCR is a joint venture affected by both animal and feed factors. The same feed will have different FCR with different animals of the same app. Also the same animal o

Referring to,@Olaoluwaniyi ,also the same animal of the same spp.will have different FCR values for different feeds of different nutritive values. Both animal and feed are important factors in determining FCR value , exactly as the case for digestibility.

It is a coefficient of an animal's genetic ability to efficiently convert consumed feed into weight gain and varies from animal to animal

Alhamed's definition is appreciated and well defined ,as it involves both animal and feed

I think it is due to the type of animal and its breed, in addition to the availability of good management factors, which include feed materials.

Inter dependency exists between the two. one cannot exactly say

Apart from the animal (breed, genetics, age, etc.) and the feed (quality or raw materials, nutrients balance, etc.) you should NEVER forget the "farmer". Farming practices are usually crucial. The farmer decides the amount of feed (portions) the timing & duration of feeding, etc. For instance, if you divide your flock in two "identical" sub-flocks and provide the same type of feed in each one, you could get different feed efficiencies if you over-supply feed to one sub-flock compared to the other. I have seen many types of feed achieving great FCR values but resulting in low growth values...are these feeds good ? It depends... In conclusion, in my opinion, FCR or FE are metrics that are useful to compare feeds only when these feeds are supplied to the same flock by the same farmer, under the same practices...otherwise, any comparison is irrelevant. So, to answer the initial question, I think that FCR or FE is best to be applied to the "farm business entity". I have met farmers that constantly achieve great FCRs with any type of feed, while others are unable to make profit even if they are supplying the greatest feed available.

Both the Animal and the feed are factors.

YES The efficiency of feed conversion in large animals is called and thank you for Q

Return to feed and reflect on the animal

FCR (Feed Conversion Ratio) apply to the animal and its It is the number of kilograms of feed needed to increase the weight of one kilogram of the animal's weight

This is the feed that you feed and what you will get from them. That is the ratio of feed application and body muscle gain in the fish.

yes we can it