pest control, you are along the right lines, but there is WAY more you could be doing. For starters, you could swap links with me, i have 2 pet control related sites, i will pm you the details.

I would also consider looking for link exchanges with property sites (you will get much more response), since you are very likely to be removing pets from homes, seems that property sites would be a resonable theme to go after. Would be a good idea to setup another site, perhaps giving general information about pests in the home, then you could offer potential property link exchanges a link from your property site in exchange for a link on theirs to your pest site.