High protein requirement in cats uses energy from.
Adequate energy must be supplied by the diet to make efficient use of dietary protein. The optimum energy density varies with species, digestive system, age and environment. In the ruminant, sufficient nitrogen and rumen degradable protein must be supplied to maximise bacterial fermentation, energy digestibility and feed intake. For young, fast growing animals and high yielding lactating animals, aim to feed high-energy diets to maximise production potential of animal protein. In older or less productive animals lower energy diets may be used to achieve maximum protein deposition or secretion without excess fat deposition. Include just sufficient protein with a good amino acid balance to support maximum protein deposition at the highest possible efficiency. Surplus protein may increase protein deposition through enhanced protein turnover, reduced efficiency of retention, greater N excretion and pollution, but with reduced net energy, less fat deposition and improved carcass composition. Protein requirements, expressed as a percentage of diet or as a protein-energy ratio, decline with age in growing animals. Phase feeding multiple diets with decreasing protein content reduces environmental pollution. Fish have lower energy requirements and require a greater protein: metabolizable energy (ME) ratio. For mammals and birds, express amino acid requirements and feed values as true ileal digestibility. For fish, faecal values suffice or can be estimated using faecal digestibility in mink or ileal digestibility in chicks. Choose protein supplements to provide amino acids that complement amino acids of basic (usually cereal) energy sources. In ruminants, the supplement should provide undegradable but intestinally digested amino acids to complement microbial protein. Methionine (or methionine + cystine) and lysine are first or second limiting. Protein requirements are reduced, with less pollution, by selecting proteins and amino acid supplements to approach the ideal protein pattern, but specifying maximum levels for excess amino acids will increase cost. Determine marginal response to amino acid supply to calculate target amino acid level in feed.
Requirement of the Components: The protein synthesis may be ..
for the supply of energy in protein synthesis.
Zinc is an essential nutrient that must be provided in the diet. Its functions are multiple and include catalytic (zinc is a cofactor in many enzymes) and structural (zinc helps to stabilise some protein structures [zinc fingers]) roles.
Zinc deficiency in dogs has been reported. It is termed zinc-responsive dermatosis (Colombini 1999) and manifests as poor growth rate and skin lesions.
The NRC 1985 recommended requirement for zinc in puppies was thought to be very low � close to that reported to cause deficiency (Booles 1991).
between 5-10% of your energy requirement is provided by protein.
Protein consists of amino acids that are classified as essential (because they can�t be synthesised by the body) or non-essential (because the body can synthesise them).
Dietary protein must provide sufficient amino acids to satisfy the body�s metabolic requirement. Aspects of this can be measured as:
Dietary protein requirements are also dependent on energy intake, life-stage (growth increases the requirement), lifestyle (physical activity increases the requirement), and other factors such as disease.
Compared with other species, the cat has a higher dietary protein requirement (NRC 2006). This has been attributed to a lack of metabolic flexibility, with less efficient adaption of feline hepatic nitrogen catabolic enzymes to dietary protein intake (Rogers . 1977).