I've killed at least 15 black widows in the last several days, inside my home and out!! We set of bug bombs Saturday after I had one crawling in my hair in bed Since then I've killed a ton more, mostly outside. Its the time of year here for spiders to come inside and they're doing just that! I need a long acting bug spray to spray on the cracks outside the house, but I need something that won't hurt my chickens. It has to be strong enough to kill black widows because I have 3 kids and cant have them biting my kiddos!! Any ideas?