Bacillus subtilis is widely used not only in feed, but also in sewage treatment and biofertilizer fermentation or fermentation bed production. It is a multifunctional microorganism.

The need for sustainable aquaculture has promoted research into the use of probiotics on aquatic organisms. The initial interest was focused on their use as growth promoters and to improve the health of animals; however, new areas have been found, such as their effect on reproduction or stress tolerance, although this requires a more scientific development.

The growth of aquaculture as an industry has accelerated over the past decades; this has resulted in environmental damages and low productivity of various crops. The need for increased disease resistance, growth of aquatic organisms, and feed efficiency has brought about the use of probiotics in aquaculture practices. The first application of probiotics occurred in 1986, to test their ability to increase growth of hydrobionts (organisms that live in water). Later, probiotics were used to improve water quality and control of bacterial infections. Nowadays, there is documented evidence that probiotics can improve the digestibility of nutrients, increase tolerance to stress, and encourage reproduction.

Probiotics are used in both human and animal nutrition for their health benefits. In animal diets, probiotics are included as feed additives to create a healthy and resilient intestinal microbial environment. Maintaining a beneficial intestinal microbial composition helps in improving the overall health of the animal and thereby positively affects body weight gain (BWG) and feed conversion ratio (FCR).

Feed additives are substances added to animal feed to enhance its nutritional value, improve animal health, and promote growth. They have become an essential part of modern animal production systems due to their ability to improve animal performance, reduce feed costs, and enhance food safety. The use of feed additives has become increasingly important as the demand for animal protein products continues to grow worldwide. This research article examines the importance of feed additives in the growth of animals, their types, and their benefits.

​It has been confirmed that Bacillus amyloliquefaciens can produce polyketide compounds and explored its possible mechanism. Furthermore, Lipopeptide substances are one of the main antibacterial substances produced by Bacillus amyloliquefaciens.

Although probiotics + enzyme complex products for ruminants can be expensive in the beginning stages, the long term health benefits and the long run returns outweigh the initial expenditures.

Although the initial investment of probiotics + enzyme complex products in animals such as sheep and cattle may increase the cost for farmers, in the long run, the economic benefits it brings are obvious. This article explains why.

Expectations are growing concerning feed additives that would guarantee such results as accelerating growth rate, protection of health from pathogenic infections and improvement of other production parameters. Therefore, probiotics as an additive has become a widely popular choice for breeders.

Using a combination of probiotics specifically designed for cattle and Mutton Sheep farming is a very effective method to promote fast growth and reduce disease in beef cattle. The future is very bright for feeding probiotics in animal husbandry.