Los Angeles County Animal Control officials are investigating Millan, 46, after a dog allegedly bit a pig's ear on an episode of Millan's Nat Geo WILD series, Cesar 911, NBC reports.
"Cesar Millan is and will continue to fully cooperate with authorities in any investigation," Nat Geo WILD officials said in a statement. "He is confident that the investigation will show there was no wrong doing."
Sheriff's deputies were asked to "stand by" while the investigation unit went to Millan's home, a spokesperson from the Los Angeles County Sheriff's Office tells PEOPLE.
In the recent episode, Millan worked with an "aggressive" French bulldog-terrier mix named Simon who has a history of attacking his owner's pot-bellied pigs, officials said in the statement, noting that Millan took precautions before letting the dog run free around the pig.
"A short clip from the episode was shared online and showed Simon chasing a pig and nipping its ear, causing it to bleed," according to the statement.
"The pig that was nipped by Simon was tended to immediately afterward, healed quickly and showed no lasting signs of distress.
After the footage aired, animal welfare officials received multiple calls and a 24-hour notice was issued for the self-taught dog behaviorist, NBC reports.
"Cesar and his animal pack effectively helped Simon to overcome his aggressive behavior toward other animals; as a result, Simon did not have to be separated from his owner or euthanized," according to the statement.