| Advantages |
Disadvantages |
| Prevent colonization of the GI tract. |
Do not protect in case of severe challenge. |
| By preventing colonization of the GI tract,
reduce the probability of internal organs
contamination |
Do not prevent the infection if chicks are
contaminated vertically (transovarially) in the hatchery. |
| |
Antibiotics capable of destroying the microorganisms
present in the probiotics should not be used. |
| |
|