Oct. 11 (UPI) -- A hidden breeding facility in Spain was found to contain the remains of 250 animals and 171 live animals that were endangered and recovered to receive veterinary care.

The illicit breeding facility was located in the back of a warehouse in Meson do Vento in Ordes, Spain, the Spanish Civil Guard announced Saturday.

The warehouse manager has been detained and faces charges for alleged animal abuse, professional intrusion in the field of veterinary medicine and illegal possession of protected species.

Most of the deceased animals were dogs and birds, including Chihuahuas, and some of the animals found living fed on the remains in the absence of food.

Many were in "different stages of decomposition, some even mummified," the Civil Force said, as reported by CBS News.