According to Clay County Sheriff Mike Heaton, the units were stolen sometime between 3 p.m., Sunday and 8 a.m., Monday.
"It's not that uncommon," Heaton said. "We've had many air conditioning thefts."
On Monday, Humane Society Manager Sam Hull was the one who realized the air conditioning units had been stolen. He said he was taking a break and when he walked around the building, he realized the three units were missing. He immediately called the Sheriff's Department.
Hull and other staff said they thought it was hot inside the building Monday morning, but didn't realize why at first.
The worst part about the theft is how it will affect the animals.
"Without the air conditioning, (the animals) will start sweating," staff member Robert Speck said. "They won't eat; they won't sleep."
Hull said, "It breaks our heart that someone would do something like this to a non-profit organization."
The Humane Society does have insurance, but according to staff, the deductible is very high.
"It's the price of scrap metal that's the reason these are stolen," Heaton said. "We'll be pulling records for scrap metal places in the surrounding areas."