I've known a few people that have raised red fox kits that were orphaned .They will forever remain wild and have the wild instincts irregardless of being in proximity with humans .
The problem with getting a baby anything wild and raising them in captivity is they trust humans too much . Even the fox kits developed a little trust around the people they were familiar with . A little testy around people they didn't know though .
To release a captive is about the same as giving it a death sentence .
The secret to raising wild critters is you can have only ONE. If there are two or more they will never really bond with you because they realize they are different. When they are alone they think they are human critters and become domesticated much easier.