The Sun newspaper has launched a new campaign in the hope of introducing compulsory microchipping, so irresponsible owners will be held accountable.
The Safer Dogs Campaign includes a petition, which has already attracted over 10,000 signatures calling for the government to take action.
Staffordshire Bull Terriers are one of the breeds most in danger, as irresponsible owners will cross breed them with Pit Bull types, which are banned under UK law.
David Grant, director of the RSPCA's Harmsworth Memorial Animal Hospital, told the news provider: "What we see in here are dogs referred to as Staffies but weighing about 25kg. They cannot be Staffies - they are too big.
"They are being crossed with pit bull terriers by backstreet breeders, and those dogs are illegal. The big dogs that are out of control pick on other people’s dogs in the street and parks."
Claire Robinson, government relations manager at the RSPCA, added that the charity would like to thank the Sun for launching the campaign and helping to ensure communities are protected from irresponsible owners and their dogs.
Earlier this year, the government announced plans to make microchipping compulsory. A recent survey by the Kennel Club found that almost 90 per cent of the British public were in favour of compulsory microchipping.