1/ Ideally try finding rats from someone that breeds feeders and buy small rats 4 to 6 weeks in age that you will raise to optimum weight 200/250 grams, do not buy adults and do not buy breeders.

2/ I keep 1.3 breeding groups in 9 gallons concrete mixing tubs in rack, you will also need to figure out how many rats you need, if you rotate your male or your females and if you also want to use individual birthing tubs. Raising to adult age can vary greatly in size from medium to xl so the size of your tubs will depend on that.

3/ I breed feeders and the only thing they are provided with are 2x4 pieces as chewing blocks, for the rest they adult breeds and the other play with one another, those are not pet, caging is kept as simple as possible.

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