The editor received news that our company is about to launch a new brand of pet food. During the meeting, the boss asked everyone what crude protein was 😨. Colleagues checked the analysis data on competitor's cans and found that each brand had different indicated values. Confused, the editor began to ask the factory to research how to calculate crude protein content in relation to actual protein data.
Crude Protein VS Protein
Crude protein is an estimation of protein content based on the nitrogen content in food; thus, crude protein is merely the numerical value displayed on the label. Protein provides amino acids and is divided into animal-based and plant-based. Besides water, protein and fat are the most important nutrients for cats and dogs. Protein is involved in the growth, development, and repair processes of the body. After integrating information, the benefits of protein include:
Promotes development: Protein is a crucial component of cells and affects bodily growth and development.
Repairs tissues: Protein has reparative functions, accelerating wound healing and repairing damaged tissues.
Boosts immunity: Protein helps maintain and strengthen the immune system.
Weight management: Protein can increase satiety and control appetite, aiding in weight management.
Prevents muscle loss: Leucine in protein stimulates muscle synthesis and prevents muscle loss.
Taking the AAFCO standard as an example, the 2008 AAFCO minimum nutritional standard for cats only discusses protein. Adult cats must have at least 28% protein in each can of their main food, while growing kittens must have at least 30% protein.
Plant-based Protein VS Animal-based Protein
While researching, I found that humans can sustain their needs purely with plant-based protein. However, veterinarians generally believe that only animal-based protein can be effectively absorbed by cats and dogs. This is likely due to their genetic origins, as cats and dogs have historically been carnivorous. Therefore, it is probably correct that pets should primarily consume animal-based protein.
Animal protein can be absorbed from eggs, meat, seafood, and dairy products. High-quality protein makes it easier for pets to digest, and good digestion naturally keeps the gastrointestinal and digestive systems in optimal condition. According to data from the United States Department of Agriculture (USDA), here are the top 7 animal protein sources ranked by protein content per 100g of food:
Chicken breast: 32.1g
Tuna: 28.2g
Lean pork: 27.3g
Lean beef: 25.9g
Shrimp: 24g
Salmon: 20.4g
Duck meat: 19g
In fact, protein gradually depletes as food is cooked or its freshness diminishes. Eggs lose the least protein, making them the highest quality protein source, followed by fresh meat. Slowly cooked fresh chicken breast (not frozen) and dry food and wet food made from fresh meat can retain high-quality protein, which is better for pets' health.