Not sure if they are an issue in everyone's area, but there are always quite a few Black Widows that make themselves at home around here this time a year. One of their favorite places to take up residence seems to be in the ridges underneath our hound's dog house.

I check it every day or so and just found the first 2 of the year had moved in since Tuesday evening. I'm not even sure what, if any, risk they pose to dogs, but I'm certainly not willing to take the chance.
So, just a warning from your friendly neighborhood spider
hater, keep an watchful eye and give a little peek now and then under the dog house if you have one.