New laws have allowed the ACT's animal control authority to destroy about six times more dogs deemed dangerous in 2018 than last year.

Domestic Animal Services, a branch of the City Services directorate, said new dog laws introduced in December had allowed it to euthanase 20 dogs involved in serious attacks.

Last year, the authority euthanased only three dogs involved in serious attacks.

Fairfax Media has asked for details on what the 20 dogs had done, what breeds they were and whether they had previously been declared dangerous, with answers promised by Friday.

The information comes as the ACT Opposition introduced proposed new laws in the ACT Legislative Assembly on Wednesday day to make dog owners more accountable when their dog is involved in an attack.