What would happen to a newborn mammal if its body could not produce rennin?

If a newborn mammal's body could not produce rennin, it would significantly impact its ability to digest milk and absorb essential nutrients. Rennin is a protease enzyme specifically responsible for curdling milk in the stomach. Here's what would happen to a newborn mammal without the ability to produce rennin:

- Impaired digestion of milk: Rennin is crucial for breaking down the protein casein, which is the main protein component in milk. Without rennin, the casein in milk remains undigested and forms a solid, indigestible curd in the stomach.

- Reduced nutrient absorption: The inability to digest milk properly means the newborn mammal would not receive adequate nutrition from its primary food source. This could lead to malnutrition, growth retardation, and overall health problems.

- Potential health issues: Undigested milk proteins can also cause digestive discomfort, gas, bloating, and diarrhea, further contributing to nutrient loss and health complications.

- Feeding difficulties: Newborn mammals rely on milk for survival, and the absence of rennin can make it challenging for them to nurse effectively. They might struggle to feed, resulting in poor weight gain and decreased energy levels.

In severe cases, the newborn mammal may not be able to survive without intervention or alternative sources of nutrition that are easier to digest and provide essential nutrients. Some mammals, like humans, can tolerate reduced rennin levels and may adapt by consuming easily digestible milk products or using enzyme supplements. However, for many other mammals, the lack of rennin production can have severe consequences and may require specialized care and dietary adjustments.