Factorial calculation of nutrient requirements in lactating queens

Area of Science:

• Animal Nutrition
• Comparative Physiology
• Veterinary Medicine

Background:

• Accurate nutritional assessment is vital for lactating queens.
• Existing data on feline nutrient requirements, especially during peak lactation, can be limited.
• Understanding these needs supports optimal maternal and kitten health.

Purpose of the Study:

• To estimate the energy, protein, calcium, and phosphorus requirements for lactating queens.
• To differentiate between maintenance and milk production needs.
• To provide data applicable to queens with large litters at peak lactation.

Main Methods:

• Utilized the factorial method for requirement estimation.
• Calculated net requirements for milk production based on milk composition.
• Estimated gross requirements considering energy and protein utilization and digestibility.
• Determined calcium and phosphorus requirements from endogenous losses and milk output.

Main Results:

• Established specific requirements per kg body weight for lactating queens.
• Derived values: 0.81 MJ metabolizable energy (ME), 14 g protein, 428 mg calcium, and 303 mg phosphorus.
• These values are applicable to queens with large litters at peak lactation.

Conclusions:

• The factorial method provides a robust framework for estimating feline lactation requirements.
• The derived values offer critical insights for formulating diets for lactating queens.
• This research contributes to evidence-based nutritional guidelines in veterinary practice.