toilet duck,
I think you should first make it clear to everyone what has happened in the very first place.
There are dogs that goes for walks with owners that does not have licenses on the dog's neck. If a dog is in the compound of a private property, nobody is allowed to take it. Neither does the authority has the right to issue any summon. There are MANY dogs that has licenses, but the licenses are kept in the house. I, for one, won't want to have a collar around my dog's neck if it's in my home compound. It'll spoil their fur and it'll be that bit uncomfy for the dog too. Authorities should check first whether the dog has a license or not. Else, the authority could just go and have their retarded mental checked for malfunctioned brain cells.
If you did no wrong, follow Tohsan's advice and file a law suit against the authorities for ...
1) trespassing into private property.
2) ROBBERY! Yes! it should be considered as a form of robbery because they trespass private property and take something without your knowledge and permission.
3) Mishandling of a private property (in this case is the dog) when there is already an owner to the property.
Ask neighbours if they saw what happened and get them to be witnesses. This will be a very strong evidence against dbkl. Then call up The Star and make headlines with it, saying that DBKL breaks into your house and steal your dog.