I usually process at 8 weeks, but once in a while I have litters 4 lbs at 7 weeks and processes them , and they were yummy... but-- can't say I notice much difference between 8 week old rabbits and 7 week old rabbits . - however, there is a big difference between 8 week old rabbits and 12 week old rabbits, -- and even more difference when I was raising for fur, many were 6 + months old at butcher time... those definitely needed to be in brine for a few days prior to eating them.....