Nope. We can't bump a calf until 7ish months. And even then you can't bunp them sometimes. Our cows are three weeks out and we don't have to bump them. Just run their bellies.
I remember when dairying I would bump cows for calves at dry off (55-60 days before calving.)
So no I absolutely could not bump a calf before 6 1/2 months pg.