A woman who used scissors to cut off the tails of eight puppies has been jailed for two months and banned from owning an animal for 10 years.
The court heard the puppies' tails had been docked with scissors
Gillian Breden, of Grove Hill, Brighton, admitted eight counts of removing the tails with no genuine medical reason at an earlier hearing.
The 51-year-old was sentenced by Brighton magistrates on Tuesday.
After the hearing, animal welfare officers welcomed the verdict and said her actions were "deliberate cruelty."
Breden had claimed she did not realise she was doing anything wrong.
She told the court that people buying the puppies all wanted animals with their tails docked.
She was given a two-month sentence for each charge, with all jail terms to run concurrently.
Brighton and Hove City Council's animal welfare service brought the prosecution under the Animal Welfare Act 2006.
The court heard the tails were removed when the puppies were a day old.
And magistrates heard that officers found the one-month-old puppies at her home in June.
Under the Animal Welfare Act 2006, tail docking is illegal unless carried out by a vet for medical reasons, or to a certified working dog.
Each case carries a maximum sentence of up to six months in prison or a £20,000 fine, the council said.
After the sentencing, animal welfare officer Maggi Hollands said: "This was a deliberate act of cruelty and we are very pleased that the magistrates have shown such clear support.
"This is a good step forward for the animal welfare team and gets the message across that this behaviour will not be tolerated.
"Ignorance is no excuse."