Staff at Battersea Dogs Home are having to cope with an influx of Staffordshire bull terriers after some owners dumped them for not being tough enough.
In the past two weeks 33 bull terriers have been handed into the south London dogs home.
Home spokeswoman Ali Taylor said some of them had been dumped for being a handful but others because they were not enough of a handful.
"Your biggest risk with a Staffie is getting licked to death," she said.
"They are very energetic and very attention-seeking.
"The biggest problem we hear on our behaviour hotline about staffies is insecurity."
Bull terriers are the first breed to outnumber mongrels in the home with 1,355 arriving during 2003.
Despite the high number, out of 27 bites to humans reported in 2004, only one was from a Staffordshire bull terrier.
Ms Taylor said most of the bull terriers had been named Tyson so their first job was to re-name them which was done using bags of dog treats.
Other popular names for the bull terriers include Bruiser and Storm.
Staff are working to train the dogs and prepare them for re-homing.