Declaratory judgments — Trial court correctly dismissed complaint claiming that as result of county’s letters regarding a dangerous dog complaint that had been filed with the county, the plaintiff was in doubt as to his rights because of “the threat of criminal prosecution” — Allegations of complaint did not establish present, bona fide dispute between plaintiff and county that placed plaintiff in doubt regarding his rights — Speculative fear that plaintiff may be subject to legal consequences if something further happens with his dog is not sufficient to warrant declaratory relief