Filing a single FIR alone would not help much unless there is a serious injury. I hope your husband is treated appropriately.
Now in such cases, it is the discussions between the owners of the dog and the resident families that would help a lot. If both the attacks are unprovoked, then find out the families living around you in the neighborhood, then check the ones with school going children and senior citizens who would be walking. Take help of local residential associations, walking groups, senior citizen groups etc. Such people, although not legal authorities will have a say in the social issues of the neighborhood.
Arrange for a meeting with between the representatives of these families and the owners of the dog. Once you assertively take up the issue with others around you, then you can get a solution and a way forward, for instance, the dog to be kept on a dog leash when it is outside the compound.
Insist about the dog's health and it's vaccination status.You can suggest the owners to have the dog assessed by a dog trainer who can find out why it's aggresive, can it be controlled.
Have video recordings of the dog's unprovoked aggresive behaviour and you can tell the owners that you would submit it to the police station and encourage the other victim also to file a police compliant.
If the situation escalates and you are not getting any response, then a group of you can meet the local municipal authority, corporator or the local MLA who can pressurize that safety is ensured. Each corporation has dog menace help line for stray dogs, contact them and step up the pressure.
There are no stirct guidelines for such issues but a lot depends on what you and the neighborhood can do.