Thyroprotein for Lactating Cows in Mid-Summer

Thyroprotein for Cows

T. .HE THYROID gland affects milk production. If the gland is removed from a cow, her milk decreases 75 percent. If it is put back, in the form of dried thyroid tissue or the synthetic hormone, thyroxine, her yield returns to normal. Both substances stimulate normal cows to give more milk and fat. The difficulty has been that dried thyroid tissue is too costly to feed cows, and if the total sup...

LECITHIN AS A SUPPLEMENT FOR MID-LACTATINg DAIRy COwS

1 Dept of Medicine Animal, Production and Health Padova Univ., Agripolis, Viale dell’Università, 16, 35020 Legnaro (PD), Italy 2 Istituto Zooprofilattico delle Venezie, Viale dell’Università, 10, 35020 Legnaro (PD), Italy ABSTRACT The study aimed at evaluating the effect of a daily dose of 14 g of choline administrated by using soy lecithins (LC group), a by-product of the biodiesel production ...

Factors affecting milk cortisol in mid lactating dairy cows

BACKGROUND Whether the measurement of cortisol in dairy cows can be used as a biomarker of adverse environmental or pathophysiological conditions is still under of scientific debate. In these situations, several systems mainly the hypothalamic-pituitary-adrenal axis, the autonomic nervous system, and the immune system are recruited to reestablish homeostasis. A first aim of the present study wa...

Predicted versus measured production differences using summer air conditioning for lactating dairy cows.

Predicted summer production losses were made for Holstein cows in three widely separated locations in the United States where field investigations of air conditioning for dairy barns have been completed. These losses, based on a functional relationship developed from Missouri Climatic Laboratory data and local climatological data, were compared to the measured losses at each location. Correlati...

Estrous Synchronization in Lactating Cows