Whatever you decide to do, please DO NOT place an empty 2-liter plastic Pepsi bottle over the muzzle of your .22 rifle, DO NOT duct tape the plastic bottle firmly in place, DO NOT chamber a round of ammunition, DO NOT point the rifle through the fence in the dog's face, DO NOT pull the trigger. Also, DO NOT discuss such thoughts, plans, or deeds with anyone, ever, and DO NOT keep used plastic pop bottles, duct tape, or empty cartridge cases.
Other things that should never be done include buying rat poison anywhere near your home or where you might be recognized, and certainly do not use a credit card or check for such purchases. Never keep your rat poison inside hot dogs or ground beef.
Unusual levels of traffic to and from a residence at odd hours does not constitute probable cause for a search warrant. Reporting such activity to police or prosecutors is a fine idea, especially with videos, license plates, descriptions, etc, but these only provide input for intelligence purposes pending the possibilities of further investigation that may or may not take place, depending on staffing, budgets, and other enforcement activities of varying priorities. Suspicion is never sufficient for search & seizure, detention, or arrest, no matter how many neighbors report the same suspicious activities.
Smart cops will take your information in confidence, then focus patrols on interdicting transactions in hopes of getting dopers to throw down their stash or give permission for a search of their cars, then present the cases in court as nothing more than a sharp patrolman acting on suspicious activity.
Worst case would be a cop citing neighbor reports as probable cause, then being forced to reveal the specifics in court proceedings, likely including the informant's name, address, and possible motivations for making the reports. A problem with the neighbor's dog is one thing, but a problem with a neighbor facing prosecution and possible prison time for dope dealing is a different sort of peeing contest.