Put up a BEWARE OF DOG sign
Here’s something that we should all get: a BEWARE OF DOG sign. According to the OP, burglars don’t particularly care about home security systems, unless it’s in plain sight. In fact, a mask and gloves work wonders and stopping cameras from ID-ing them. What you should get is a sign that informs random passersby that you have a huge, ferocious dog.
This sign is usually more than enough to get your address off of the to-burgle list. It doesn’t matter that you don’t have a dog. The thought of running into a blood-thirsty canine in your backyard is more than enough to make anyone think twice about entering.