I live in a townhouse and every year they use fertilizer, weed killer, and pesticides on the grass and its really annoying. Anyway, they just used weed killer and Im wondering when I can bring my ferrets and rats outside. Its been a little over a week and it has rained. Im not going to bring my rabbits or guinea pigs outside anymore this year because they eat the grass but ferrets and rats dont so would it be ok?