Ridgefield Police officials are reminding residents to have all dogs over the age of six months licensed. There are about 300 dogs in Ridgefield that are still unlicensed. A valid rabies certificate, signed by a licensed veterinarian, must be presented to the Town Clerk before a license will be issued. If the dog has been spayed or neutered, written proof must also be presented. Licenses expire June 30th and new licenses must be obtained on or before that date. A penalty of $1 per month is imposed by state law for late registration.