Pretty much what the title says...

I was just looking through some info on here and the weights seem realllly low for these guys, and to wait 2 months or longer to have a nice size rodent seems a little long no? I was interested because my rats don't smell realllly bad, but enough to bother me so I'm thinking about switching. Just wondering what you guys think is more efficient in terms of having the right amount and right size rodents, at the right time. Thanks all!!