(1) In nature, by inheritance from reptiles, birds hatch with a mature digestive system able to digest complex foods similar to those that make up their adult diet. On the contrary, mammals need a maturation period of their digestive system.

(2) When the animals are raised on the farm, some changes are introduced in the feed that alter these processes, to which is joined the use of concepts that distort the explanation of the mechanism of digestive processes and derivative metabolic processes (acidosis and alkalosis) that influence welfare.

(3) The glandular stomach of chickens and hens, produce sufficient hydrochloric acid to hydrolyze the feed ingredients, from the first day, and yet there is talk about using acidifiers. in fact, they are false acidifiers, they are weak organic acids with effect on bacteria and fungi contaminants of food, therefore they are not acidifiers, if they are preservatives.

(4) The stomach of newborn mammals does not produce enough hydrochloric acid. Therefore, if, at early ages, feeds with a high capacity of acid binding are included, feed is left undigested and the percentage of diarrhea increases.

At this early age it is appropriate to add acidifiers, strong mineral acids, to help digestion.

(5) Thus, at the first age in birds it is appropriate to use weak organic acids as preservatives, while in mammals it is appropriate to use strong mineral acids as digestion improvers

(6) On the otherwise, if nutrition is studied in more advanced ages we see that, both in birds and mammals, it is beneficial to use alkalinizers in the feed.

(7) In birds, a moderate dose of alkalinizers is beneficial to improve the quality of the eggshell, reduce the impact of caloric stress and to improve the electrolyte balance.

The dose of alkalinizers should be balanced with the dose of sodium provided by common salt and the potassium content of the raw materials.

(8) In mammals, a moderate dose of alkalinizers is beneficial to improve the impact of heat stress, improve intake and the electrolyte balance in pregnant and nursing females.

(9) In conclusion, the use of alkalinizers, in birds and mammals at older ages, is physiologically justified by its efficacy to improve the electrolyte balance, reduce the impact of caloric stress and improve feed intake.

(10) At Biovet we research on the use of acidifier, alkalinizer and the result is the development of:

1. ALQUERFEED ACIDIFICANTE
2. ALQUERFEED LACTORUMIANTES
3. ALQUERFEED RUMINATORIO
4. ALQUERFEED OVOPONEDORAS
5. ALQUERFEED LAYERS