How long should I wait for an e-mail reply?

[wolfie]

I sent an email to an animal rights orginization (see this thread for more info) over a week ago, and I have yet to get a reply. How long should I wait before I send another one? I don't want to be rude and send it twice, but if they never got it...

[G.P.girl]

maybe wait a couple more days, maybe they'll get around to it on monday. i sent an email to a horse organization and they never replyed so i sent another and they finally replied to the third one

[wolfie]

Yeah that's true G.P.girl, they probably wouldn't reply on the weekends. I'll wait a couple of days before writing again.