This application allows both to have elements of demonstration and explanation of the BACA and to calculate the BACA of animal rations.The risk factors for metabolic diseases have been taught for decades and yet reproduction is deteriorating, production is not always up to the ration and milk fevers, ketoses, metritis, abomasum are still at the rendezvous of first days of lactation.Whose fault is it ?In the management of dry and hypocalcemia.To manage the lack of calcium it is necessary to play on ...... the calcium?Not at all, on Chlorine, Sulfur, Sodium, Potassium and Magnesium. The first two are Anions, the next two are cations, and Magnesium plays its part by itself, but it is equally important since the activation of Parathyroid hormone, secreted during hypocalcemia to meet the increased calcium needs, can not be effective only if BACA and Magnesium level are satisfactory.In a few screens and with very educational animations BacaNotes presents all these points of the management of BACA in almost playful form in order to be understood by all.An additional module allows you to quickly evaluate the BACA of dry cow ration and proposes solutions to correct unbalanced rations (with PDF edition).Having in your pocket, your smartphone or tablet and all that is to know or explain about BACA and what to fix situations at risk is the ambition of BacaNotes.