ML, I was once told that inbreeding in cows is OK unless a bull mates with a "true daughter". I have no idea whether that is correct. I have to admit that I haven't seen the result of that. I've kept the same bull for 3 or 4 years. It has mated with everything. I generally changed bulls when they got about 6 or 7 years old. At that time, I understand that the sperm count drops.
