The paper by Joseph M. Stookey, Professor of Animal Behaviour at Western College of Veterinary Medicine (and I apologize for my ignorance about that college. I think the term “obscure” is necessarily subjective) cited above in my previous post, actually is based on a research study done at UC Davis. The study was on male Herefords. One group was hand raised and the other not.
In nearly all our livestock and wild species (horses, dogs and cats may be the exception) bottle raised intact males will show aggression towards humans when they reach sexual maturity.
Most people mistakenly believe that dairy bulls are dangerous because of their genetics. It is true that most dairy bulls are dangerous, but it has more to do with their rearing conditions then their genetics. Most dairy bulls are hand reared in isolation which contributes to their behaviour towards humans when they become adults. Dr. Ed Price, a behaviour researcher from the University of California at Davis, has shown that Hereford bull calves raised in isolation and hand fed by humans became dangerous to people when they reached adulthood, whereas their group raised counterparts where not mean towards people.
citation for the Hereford study:
Price, E.O. and S. J. R. Wallach. 1990. Physical isolation of hand-reared Hereford bulls increases their
aggressiveness toward humans. Appl-Anim-Behav-Sci. 27:263-267
I highlighted the comment about horses dogs and cats because it pertains to this discussion. I have read that too-early weaning in male cats is associated with aggressive behavior. I don’t feel like looking for that study right now, but trust me: because everything you read is true. Or don’t trust me and research it for yourself.
The point of all this is that I believe that hand-rearing male animals can cause problems. I don’t know exactly which part of hand rearing causes the problems but I would not enter into the process lightly, and without educating myself, talking to people who are experienced at it, and finding out about the social, medical, and other special needs of a hand raised and/or bottle raised animal, especially a male animal. An aggressive cat is a pain and a problem. An aggressive horse is a pain, a problem, and a potentially deadly threat.