Re: 1.4 rat typical yield
First off, nutrition info is nice but the simple facts are, sometimes you will get bad parents that neglect or kill babies.(male and female)
I produced many thousands of rats off doggie bag and also many off brands like Mazuri, Harlen, and Zieglers. i never saw much difference in quality or quantity gains. I did see a huge difference in the amount of food consumed and the monthly costs to me.
Re: 1.4 rat typical yield
I'm hoping you're planning these 1.4 bins as pinky factories? Cause I gotta say, I've never seen a bin big enough to house 5 adult rats and 4 litters all at once.
Unless you remove the babies within I'd say a week on the outside you'll get cannibals just from the overcrowding.
And you will have 4 litters all at once... like women living in the same house the girls will synchronize on you eventually.
But anyway, 1.4 you'd def be looking at 32 to 50 babies a month depending on how big a litters your mamas have and how good a stud you've got.
If you've got good nurturing stock they'll raise the babies as a group, the mommies will take turns sitting on the nest, even you're male will keep the babies warm if for some reason all 4 females are busy.
But!!! The cage must be clean, it must NOT be overcrowded, and they must have adequate food and water. Any major failing in quality of life will cause good rats to become cannibals.
Also on the food note: I feed 1/4 mazuri and the other 3/4 is made up of hog feed and cheap cheap dog food.