Calves do not "breastfeed," actually, because their dams, the cows, do not have breasts like human mothers do. Cows have what is called an udder, and the action to which a calf relies on its mother for milk is called suckling. The length of time a calf--particularly a beef calf--remains a suckler is for around six to eight months.
Nipple piercings may interfere with your ability to breastfeed. But you should be able to breastfeed as long as you remove your jewelry.
It is possible to breastfeed while taking antidepressants as long as you are carefully monitored by a physician.
immediately
That depends on the breed and birthweight of the calf. Every calf is different, and have different lengths. On average, though, a calf may be about three to four feet long from the tip of the nose to the tip of the tail.
Almost immediately if that's the purpose of the calf--for meat and not breeding.
About 1 week.
As long as the cow thinks it is necessary to hide that calf. Usually a cow will hide her calf for a week or two after birth until the calf is strong enough to be up, running and playing with the other calves.
This depends on when you first put the calf on the bottle. But mainly, it'll be a few months that a calf goes from being dependent on the bottle to being fed as a feeder calf.
Right after birth, or as soon as the calf is out of the birth canal.
For only 2 or 3 seconds.
A squirrel is a mammal and all mammals breastfeed their young, so yes, squirrels do breastfeed.
All mammals breastfeed.