He keeps barking at the end of my lawn and sometimes scares my cat. Should i kill it when they are at work one day?
Don't get me wrong, they would never find out that i did it. There's a woods near my house.
Yes absolutely! Don't complain, say nothing to the authorities and act all doggy-lover when the stupid beast is around. You need to put yourself above suspicion and if you fail in this you could be looking at jail time.
If you're satisfied that nobody can pin the dog's death on you, then go ahead. But be careful! Antifreeze or rat poison mixed with meat will work but buy them out of town, PAY CASH, and get rid of packaging and excess materials out of town also.