<In addition to what has already been suggested, have a camera pointed at your coop - NOT your neighbor - and have it record when he flashes your coop for additional evidence. I would also still bring this up to the police so they have his bad behavior on file>
Totally agree with this. Maybe you can try to get him for animal endangerment - does your country have SPCA (Society for the Prevention of Cruelty to Animals) or similar?
I can't easily find anything legal from this side of the equation re animal harassment. However, with the lights... here's some internet advice:
"Review your local municipal or county ordinances, as many have regulations around light pollution and nuisance lighting that could apply in this situation. You may be able to file a formal complaint if the lighting violates any codes"
"I told the person that if [the county] couldn't enforce any law against them [for shining lights on my property], that I was going to install the biggest light I could get my hands on, and point it directly at their house. They stopped"
"The first thing to do is call the local government and find out with rules are for outdoor lighting at night. If security lights are allowed, as they are in our area, they may have to be pointed down to cover just the property owner’s property...Lights that point straight out are a hazard to drivers and pedestrians because they are blinding...If they don’t comply, buy a parabolic mirror and position it so that the light reflects back at them."
"You can file suit for private nuisance. This is a fairly textbook case of private nuisance. The neighbor’s intentional creation of a condition (the spotlight) that interferes with the use and quiet enjoyment of your land gives you a cause of action for private nuisance. The suit, if successful, would give you a right to an injunction, and money damages if your lawyer can conjure a way to calculate them and prove them in court."