Joshua Gould, 23, from Essex, abused three children and documented the abuse over a number of years.
Gould was caught with 1,300 sick images of children being abused and 52 extreme deviant images which involved a female dog.
He appeared at Basildon Crown Court to be sentenced after pleading guilty to eight charges
He was given three years in prison for three counts of assaulting a girl under the age of 13 by touching. Gould was then handed a three-year sentence for one count of taking indecent photographs or pseudo photographs of a child, and nine months for a similar charge.