There could be many reasons to this, and one is as likely as the other:
1) You're too impatient. Usually it takes an hour or two for a calf to be able to get up. Some calves are more vigorous than others, depending on their breeding.
2) The calf went through a tough birth, which it needs the time to recover
3) It's a stillborn calf (born dead)
4) It may have gotten up already and has laid back down to go to sleep
5) He hasn't nursed yet probably because his momma won't let him
6) The outside temperature is too hot
7) The outside temperature is too cold and the calf is too chilled to get up or has frozen feet
8) The calf could be injured and unable to get up.
The Udder is used to feed the newborn calf.
The blue whale calf, at up to 3 tonnes.
A newborn Highland calf has an average weight of around 40 to 50 lbs.
A newborn calf, a baby calf or just a calf.
A newborn elephant is called a calf.
A newborn Longhorn calf averages around 40 to 50 lbs.
calf
calf
a calf
It is called a Calf
A calf
Calf.