Perhaps I am getting a tad bit obsessive about the whole thing. In my spare moments, I find myself Googling search terms like "homemade dog deterrent" or "organic doggie no." I stare out the window, ready to catch neighbors in the act of letting their dogs use our flowerbed as a toilet. At three o'clock this morning you would have found me in the yard, sprinkling a mixture of black pepper, red pepper flakes, and cayenne pepper along perimeter, because I read on some gardening forum that it was guaranteed to keep dogs out. It made my eyes water, I'm sure it would tickle Fido's nose, too.
It's all meant to act as backup for the mini wrought iron fence I finished putting up. Please note that I took all pictures at a slight angle so you can't see that the fence is a bit crooked. I'll be straightening that out shortly. Here it is from the sidewalk (note the absolutely useless No Dogs sign):

And from within the yard:

I know, I know, I really need to cut the grass. Somebody last year,
I won't say who, thought a push mower was the way to go. It's actually a pain to use, and won't even cut through the wheat grass or crab grass. So I've upgraded to an electric mower. I just need to get it assembled. And we haven't had any real rain in weeks, so everything is crunchy. So it's not looking its best right now.
A close up from within:

The purple shrubs are Diablo Ninebarks. They've more than doubled in size since I planted them last fall, and will get up to eight or nine feet.
Looking out toward the corner, at the river birth we planted last summer. To the left is a Centerglow Ninebark I planted a month or so ago.

In the distance, you can see the tacky black plastic I'm using on the parkway corner to kill weeds and grass. Not sure what I'm planting out there yet, maybe some more of these:

Oopsy, I forgot to rotate that photo. How about this:

The Asiatic Lilies are pretty much maintenance free, and we've had blooms going on for over a month now. It the dogs get to them, though, they're goners.
So yeah, I admit it. I'm obsessed with keeping roaming critters from destroying our investment. And even though I used the pepper combo early this morning, for good measure I just a few moments ago sprinkled the perimeter with a commerical doggie no product.
I'll let y'all know how it goes. The problem isn't the dogs, it's the people attached to the other end of the leash.