Force feeding calves with metal or plastic tubes is a little known practice outside the dairy industry. It’s a disturbing invasive practice of force-feeding essential nutrients to calves using an esophageal tube feeder. Normally calves get these nutrients from their mother.
Cows, like all mammals, must give birth in order to make milk. Like human mothers, they carry their babies for nine months, then begin to lactate to nourish their young.
Enter the dairy farmer, who steals the newborn calf from their mother within hours of birth, traumatizing both, in order to maximize profit. 97% of newborn dairy calves are forcibly removed from their mothers within the first 24 hours.
While most mammals receive immunoglobulins in utero, across the placenta, calves are born with none, and therefore, have inadequate immunity at birth.
In a natural setting, where the cow is able to tend to and feed her calf, the newborn would get the critical colustrum, the first secretion or milk from the mammary glands after giving birth, rich in fat, protein and antibodies.
But in the dairy industry where both cow (mother) and calf (child) are treated as units of production, farmers often have to resort to using a cruel tool called the ‘bovine esophageal feeder’ to force feed the colustrum into the calf, particularly when bottle feeding is ruled out.
“There are times you must get fluid into a newborn calf that needs colostrum” reports Countryside. 
The bovine esophageal feeder is essentially tube feeding the calf; if anyone had this procedure in hospital, you will know it is not a pleasant one. The feeder or probe can be metal or a stiff plastic tube…