Calcium butyrate, when coated, can have beneficial effects in poultry.

Coated butyrate products: By using calcium butyrate, the slow-release effect is further enhanced (1: coating, 2: slower solubility compared to sodium butyrate). Because of the lower solubility of Calcium butyrate compared to sodium butyrate, coated calcium butyrate products are more concentrated in active ingredient (butyric acid). As a result of the slow-release effect and the high concentration, the butyric acid can reach the distal part of the gastrointestinal tract.

references:

Butyrate presence in distinct gastrointestinal tract segments modifies differentially digestive processes and amino acid bioavailability in young broiler chickens. Moquet et al., 2017

Implications of butyrate and its derivatives for gut health and animal production. Bedford et al., 2017

nice

Julie Feyaerts Thanks Dr. but which one is superior calcium butyrate or sodium butyrate

I think it needs re-check up. The reverse is true

Article Implications of butyrate and its derivatives for gut health ...