Bruce, Pablo, Lola, and Nellie had a tough start.
They were among nearly 80 springer spaniels found living in squalor earlier this year in a house of horrors.
Rescued by the RSPCA, all four have now been given a new lease of life - fighting crime on the streets of Manchester.
The quartet are Greater Manchester Police 's newest recruits, and will now go through specialist training to become sniffer dogs.
They were among 78 dogs found living in a filthy house in Doncaster in April. One rescue boss described it as “one of the worst cases of cruelty” they had seen.
The spaniels, four other breeds, two cats and a chicken, were taken to safety after being rescued from a detached house in the countryside.
Officers were aghast by the smell of ‘faeces and filthy’, conditions and the volume