I'm using a lame cow and heifer to rear calves, the cow calved I took her calf off her and the next day introduced three heifer replacements the same age. She stood there fed two of them & I gave the third a bottle and put them all on grass together. The third calf refused the offered bottle two days later as she was getting enough off the cow.
Introduced two day-old calves to the heifer in the same way when she calved the next day. I've never actually seen any of them sucking her, though she babysits the whole group and her udder isn't getting real tight. I take a bottle and check if any of them are hungry once a day and just one calf comes running, the one tagged as a future herd bull. He must be getting something off the cows as well because one bottle a day should have him looking pretty gaunt by now - he's five days old.
And he's behaving like a very, very cute pet.
D'you reckon I should curtail that behaviour by putting him back in the calfshed next time I have an opportunity and raise him as one of the group, so he isn't getting as much individual attention? Seems a bit pointless anyway putting calves out on cows then bottling one day after day, but he's showing no sign of choosing cow rather than bottle and it's been four days. There's no way I have time to spend fostering them on.
It's possible he's just one of the 'people-loving' calves - I get one or two every year - in which case he might not be suitable for a bull at all.
being a good operator simply increases the chances that the owner of your lease block will call it a good farm and sell it for way more than it's worth.