Puffer pig

"But why was it so important to get this pig here?"
"Because a puffer pig has a nose for precious minerals. It can do the job of a dozen mining scanners."

―Hera Syndulla and Lando Calrissian^[src]

Puffer pigs were a non-sentient mammalian^[2] pig species. They were capable of sniffing out valuable minerals with the efficiency of a dozen mining scanners, making them very valuable to smugglers and miners.^[1] The Mining Guild was known to pay very well for the animals.^[3] When frightened, puffer pigs would inflate their bodies to massive proportions, and were capable of multiple size increases if further threats occurred.^[1]

The galactic entrepreneur Lando Calrissian once traded with the criminal Azmorigan for a puffer pig, offering him the Twi'lek pilot Hera Syndulla in return. Calrissian planned on using the pig to find minerals on the planet Lothal; however, Azmorigan confronted Calrissian and demanded the pig back after Syndulla escaped from him. Syndulla and her crew, along with Calrissian, then defeated Azmorigan and his men, using the pig itself in the combat to knock down several of the criminal's men.^[1]

Years later, the Spectres traded several pigs to the crime lord Cikatro Vizago as payment for smuggling them onto Lothal, which had come under a severe Imperial lockdown. After landing at the town of Jhothal, the Spectres used the pigs to escape from an Imperial boarding party by taking advantage of Lasat warrior Garazeb Orrelios' tendency to scare the animals, causing the Imperials to be surprised by a barrage of inflated pigs. Vizago, who had been arrested, attempted to escape as well, but couldn't resist trying to take along one uninflated pig, scaring it and becoming trapped when it inflated.^[3]