Understanding Animal Feed Types: Fiber and Protein Content

Animal feed can be broadly classified based on its composition, particularly the levels of fiber and protein it contains. Different types of feed serve different purposes in an animal's diet, providing the necessary nutrients for growth, maintenance, and production (like milk or eggs).

Roughage vs. Concentrate in Animal Diets

Two primary categories of animal feed are roughage and concentrate. The key difference lies in their fiber and nutrient density:

• Roughage: This type of feed is characterized by its high fiber content and relatively low energy and protein concentration. Examples include hay, silage, and pasture grass. Roughage is important for maintaining digestive health, especially in ruminants.
• Concentrate: This type of feed is the opposite of roughage. It is low in fiber and has a high concentration of energy and/or protein. Concentrates are typically made from grains (like corn, barley, oats), oilseed meals (like soybean meal, cottonseed meal), and other processed by-products. They are used to supplement the diet provided by roughage, helping animals meet their nutritional requirements for production or growth.

Identifying the Correct Feed Type

The question describes an animal feed that is low in fiber and contains relatively high levels of protein. Let's examine the options provided:

• Milk producing food: This describes a function of the feed (promoting milk production) rather than its physical or chemical composition regarding fiber and protein levels.
• Micro nutrient: Micronutrients are vitamins and minerals required in small amounts. They are not a type of bulk feed low in fiber and high in protein.
• Roughage: As discussed, roughage is high in fiber, which contradicts the description given in the question (low in fiber).
• Concentrate: This type of feed is specifically known for being low in fiber and having high levels of nutrients like protein and energy, fitting the description perfectly.

Therefore, animal feed which is low in fibre and contains relatively high levels of protein is called Concentrate.