In recent years, nanotechnologies have been applied more
and more in the field of animal production. Not only can it improve
animal immunity, oxidation resistance, and production and
decreased antibiotic use and manure odor, which is conducive
to bring environment improvement. The resistance of bacteria
towards traditional antibiotics currently, constitutes one of
the most important health care issues with serious negative
impacts in practice. Clean and healthy farms are the premise of
the healthy growth of livestock and poultry, which is also very
important for the safety and health of staff and improvement
of the surrounding air and water environments. Overcoming
this issue can be achieved by using antibacterial agents with
multimode antibacterial action. Silver nano-particles (AgNPs)
are one of the well-known antibacterial substances showing
such multimode antibacterial action.