At the end of the last century there was an abuse of antibiotics, especially with the development of intensive livestock farms where they were used as growth promoter or even to prevent diseases in healthy animals.

Unfortunately, the excessive and prolonged use of these products by men and animals has favored the selection and development of microorganisms resistant to these substances, so much that today they are considered the main causes of the growth and spread of antibiotic bacteria-resistant with consequent loss of their effectiveness in the control of pathologies and / or therapies in humans.

Antibiotic resistance represents one of the greatest threats to public health, food security and leads to higher costs of medicines, prolonged hospital admissions and increased mortality. These phenomena of resistance are becoming more and more frequent and they must also be checked because research today is not able to provide or contribute to the production of new, more effective substances. In the animal breeding sector, the correct use of antibiotics is fundamental to prevent the presence of residues in food, to guarantee the efficacy of the therapies and limit the onset of resistant germs (EFSA, 2017).

For all these reasons, in Rossi Group fish farms, the philosophy of the company has always been to put research and improvement of "animal well-being" first, as only in this way can the best results be achieved in terms of product quality and production performance.

Based on many years of experience in fish breeding and considering that Rossi Group can now control all the production phases, it was decided to plan a protocol to produce "antibiotic-free" trouts.

The welfare of farmed fish has always been an aspect of great importance for Erede Rossi Silvio, since this condition, in addition to responding to ethical reasons, seems to have a strong impact on the development of pathogenic infections, the yield and the quality of meat. All this can be protected only by reducing those negative aspects that are directly related to the management of the farms themselves.

In the case of Erede Rossi Silvio farms, the large volume of the tanks used, and the low unit densities adopted are able to favorably affect the fish's state of well-being. The possibility of movement therefore plays a fundamental role on the well-being of the fish, on their morphological characteristics and on the quality of the product.

The quality is precisely high as an intrinsic consequence of the adequate feeding of fish, of the precious environmental qualities and of the swimming activity to which animals are constantly subjected. In these breeding conditions, the fish have more developed and compact muscle masses, less perivisceral fat accumulation and consequently a greater yield.

Nutrition plays a fundamental role in fish farming as the reduction of breeding stress and the well-being of fish, in large part, depend on the quality of the diet. In fact, very often the state of health of the animals, especially of the fish, depends on the type of food administered, on the quality and digestibility of the raw materials used.