This cold-blooded mom ditched her 5-month-old son at their Bronx shelter, where he spent three days alone under a bed until he was found Friday, officials said.

Cops are now hunting for the horrible mother, identified as 41-year-old Shakeria Spaights, who left her infant son at the Summit Avenue facility sometime Wednesday.

Concerned attendants at the shelter noticed they hadn’t seen Spaights in some time, so they went to check on her Friday.

That’s when they spotted the baby underneath a bed. The child was taken to Jacobi Hospital in stable condition.

Spaights has 15 prior arrests, including drug and prostitution charges.