Yes i agree with the others, i would think long & hard about breeding, have you homes lined up yet, your going to need tons of food & the handling is of the upmost importance otherwise you will strugle to home any if there really nippy
The more kits you have the more you need to feed, if there not getting at least 4 meat meals a day at the 5 week stage you will really struggle with them, seperating into smaller groups does make the feeding /handling easier, so you will need extra cages as a standby to do this if its a big litter
Personally i wouldnt breed by choice theres goin