We make 3 cuts generally. This is a commercial herd. First; at weaning- nope don't like her at all. Don't like her mommas disposition and she is a nut case....crummy legs, no butt....whatever. Usually at least half of the heifers go. We have been having 60-80% heifers the last 2 years too.....
Second; We bangs vacc all potential keep heifers....so, just under a year. Ah she's still just okay don't think we'll keep her....any other attitude lack of willingness to come to a catch pen for feed etc. If her momma is a good cow, calves consistently, things like that. Also, what we need to pay, so any that are so-so will go.
Third, about 16-18 months. These are what we really scrutinize as they will be going to be bred in the next move. Any bad legs, any attitudes, any that just don't seem to "feel or look right."
Then the final cull, if they aren't preg......Shipped 3 out of 16 this past year. No reason, vet said they were okay inside, maybe a little premature repro tracts....GONE... We usually don't have 1 out of 15 open so don't know the reason. All the rest were in the 6-7 month range and all but 4 have already calved within 3 weeks.
We calve twice a year, so have 25 +/- heifers calving a year. Will be culling harder now as we have culled alot of ANCIENT old cows the last couple of years for repro., and were trying to keep our numbers up. We also are losing a rented pasture so may cut back even a bit.
Sometimes it works out that we kept some longer, as right now prices of 5-7 wt heifers are as high or higher than the 4 wts. So we got more per pound and they had added weight.