Feed-grade silica, also known as silica feed additives or silicon dioxide feed supplements, refers to a type of silica that is used as an additive in animal feed. Silica is a naturally occurring compound composed of silicon and oxygen and exists in various forms, including quartz, amorphous silica, and diatomaceous earth.

In animal husbandry and livestock farming, feed-grade silica is added to animal diets for several reasons:

1. Anti-caking agent: Silica helps prevent feed ingredients from clumping together, improving the flowability and consistency of the feed during storage and handling.

2. Pellet binder: In pelletized feeds, silica can act as a binder, helping to maintain the structural integrity of the pellets.

3. Improving digestibility: Some research suggests that certain forms of silica may have positive effects on gut health and digestibility in animals.

4. Mycotoxin control: Silica may have adsorptive properties, which can help bind and reduce the bioavailability of certain mycotoxins in the feed, thereby protecting animals from their harmful effects.

5. Bone development: Silica is an essential nutrient for bone formation and development in animals.