Do farm pigs foam at the mouth?

Lots of stuff i think. I know if that if they are owned privately they are fed scraps and acorns and old milk but i do not know about farms.

Pigs can be kept outdoors or in confinement. In confinement they often have a pen or stall all to themselves where they eat, drink and sleep. Boars are often in a separate pen to the sows and gilts...

Eat, sleep, have babies and maybe get slaughtered.

Yes. They get many illnesses that are common to humans also. They are vaccinated at an early age (between 4 - 6 weeks). However, some things do not have a vaccine. There is a respiratory ailment...