Cows naturally eat the placenta after their calf is born. This is to deter predators from investigating the birthing site and possibly finding the cow's calf. It is something done by all ungulate mothers, both domesticated and wild.
No.
YesYes
The placenta is supposed to be naturally expelled around 5 to 10 hours after the cow has calved.
Oxytocin is one "medicine" recommended by vets to help a cow get rid of retained placenta, even if it's just pieces of it.
No. The human embryo would die because it cannot attach itself to the uterine wall of the cow due to the fact that the placenta of a human is much different from the placenta of a cow, and that a human and a cow are genetically very different from each other.
Any sound that the cow has associated with being fed.
Normally a cow should push out the placenta a few minutes to 48 hours after giving birth. Any longer, such as 10 days, would be considered "retaining of the placenta." If a cow retains her placenta, DO NOT PULL IT OUT!! Contact the vet to get some hormone such as oxytocin or something similar to encourage her uterus to contract and push the placenta out. If you pull it out you will cause metritis or uterine infection, which is NOT good for your cow.
Depends on what the cow's eating and how much it's fed.
Nutrients pass through the placenta into the baby through the umbilical cord.
You cannot make a cow. Feed is to be fed to a cow, not to make one.
DO NOT under ANY circumstances get the placenta out of a cow!! You will invite serious infection in the uterus (called Metritis) if you do this, causing serious illness if not death of your animal. You MUST let the cow push the placenta out by herself, and assist her with an injection of Oxytocin to help push it out quicker since it is a retained placenta.ONLY remove the placenta IF AND ONLY IF A) She has a prolapsed uterus or B) she has had a C-section. And only THEN should you let a VETERINARIAN do the job.
Your dog is not a cow