There is no way to tell exactly how many cows are killed worldwide each year. It is estimated that 35 million cows are slaughtered each year in the US alone. In Canada, it is estimated that 12 million cattle are slaughtered each year.
This question asks for an unrealistic and implausible answer. As such, it cannot be answered because there are no statistics present that show how many cows are alive. The question also fails to state what point in time cows are alive, whether it is at this moment, or in a day, a month, a year, etc.
As far as domestic bovines are concerned, only one.
20 billion
Strictly speaking, no, because "cows" are female bovines. Bulls, which are male bovines, do have testicles. Steers are castrated bovines and therefore have had their testicles removed.
Bovines (cows, steer) provide milk and meat for human consumption.
Babbling Bovarian Bovines are found in Nassau county homes for the elderly.
Cows are female bovines. Bulls are male bovines. Therefore they have the same digestive system!!
According to the related link below, the FAO estimates that there were 26.5 million dairy cows in the world in 2010. The statistic for number of beef cows in the world is more vague, because beef cows are lumped in with the "cattle" category, not individually as female mature bovines.
encephalitis.
Cattle, or cattlebeasts, or bovines.
umm....a farmer.
They are long-haired Yaks
The term antelope is used to refer to many species of even-toed ruminant indigenous to various regions in Africa and Eurasia. Antelopes comprise a wastebasket taxon within the family Bovidae, encompassing all Old World ruminants that are not bovines, sheep, or goats.
bovines
Buffaloes eat mainly grass like all bovines do.