If you don't get em soon, they multiply like crazy. After I figured out how they were getting in the house, I caught 13 in a 2-month span in the summer and 7 more in one week in December, 05. I used a combination of sticky and mechanical traps. Caught mostly little ones, (got 2 on 1 sticky trap once), then nailed 2 larger ones (one right after the other) and then the problem went away. No more carcasses to clean up, no more digging and scratching sounds in the walls. I can sleep soundly at night again. I can only assume that the last 2 were parents. Been safe for about a year now. If you use sticky traps, place them against the walls. I use the stickys on carpeted surfaces. Place 2 next to each other. I've discovered that they can leap over a single trap, even the little ones. I used mechanicals on hard surfaces, they can draw a lot of blood sometimes.
Those little bastards.
I thought about a cat, but the dog would try to hump it.