Pit bull terriers, bull mastiffs and Rottweilers were involved in attacks
More than 800 dog attacks have been investigated by the police across south Wales over the last two-and-a-half years, according to the latest figures.
In one incident a toddler was targeted by a dog, while in others people suffered facial injuries and other pets were killed.
The figures were released to Cynon Valley AM Christine Chapman under the Freedom of Information Act.
The assembly government is facing calls for compulsory microchips for dogs.
Concern about dog attacks was heightened after a four-year-old boy was mauled to death by a pit bull dog in Liverpool last month.
John Paul Massey died from severe neck and head injuries following the attack at his grandmother's home.
The figures released to Ms Chapman showed that pit bull terriers, bull mastiffs and Rottweilers have been involved in the Welsh attacks.
In total, there were 812 incidents across the South Wales Police region with 11 dogs having to be destroyed.
The figures run from early 2007 to late 2009.
In one incident in Merthyr Tydfil in June 2008, a Jack Russell dog "ran at an 18-month-old child".
In another in Tonyrefail in June 2007, a Rottweiler approached a pram "aggressively".
In another in Cardiff, an attack by a pit bull terrier left the victim with groin injuries.
Labour AM Ms Chapman said: "People have suffered awful facial injuries and even pet cats and rabbits are being killed. This is completely unacceptable.
"I will be lobbying the rural affairs minister to introduce compulsory micro-chipping as soon as possible."