The remains were found on Wednesday in the area of Welsh Road and Blair Mill Road in the Willow Grove section of Upper Dublin Township.
The female Pit Bull Terrier, believed to be between six months and one year old, was found inside a metal crate that was wrapped in plastic and sealed with tape.
Police say pieces of drywall were used as the bedding for the crate.
A necropsy found the puppy was seriously underweight and died from suffocation.
Upper Dublin police and the Montgomery County SPCA are investigating the incident as a torture case.
The Upper Dublin Township Police Department posted a picture of the crate on their Facebook page.
PETA is offering a $5,000 reward to find the person who killed the puppy.
Anyone with information is asked to contact the UDPD Detective Division at 215-646-2101.