狠狠撸

poultry chicken egg formation feed mill processing poultry feed animal feed poultry farming vitamins poultry nutrition forms of vitamins coccidiostates coccidiosis factors affecting pellet quality pellet quality record keeping feed additives growth health intestine respiratory diseases mycoplasma crd nd ilt ib moa of antibiotics classes of antibiotics hatching eggs egg collection breeder hatchery egg quality egg storag incubation phytase exogenous phytase exogenous enzyme phytase in poultry moa of phytase types of phytase sources of phytase pelleting antibiotic farm records fowl comb wattles introduction eggs nutrional values of eggs egg structure egg food food value egg nutrition egg composition poultry eggs static pressure poultry science poultry production ventilation poultry house ventilation air exchange air volume air speed cooling pads conditioning trachea lungs tylocin tiamulin egg production amino acids poultry nutrtion nutrition functions of amino acids chicken egg poultry feed mill feed mill dose rate vitamins dose medicines machinary elevator conveyer capacity body parts external body parts