How long does a 300-350 pound calf have drainage after castration? We cut 1/3 of the sack, pulled/cut testicles, sprayed w/antiseptic/fly repellent, tagged, and gave a shot of Covexin to seven big calves and one 125 lb calf last Thursday. The smaller calf seems pretty much over it already, but the larger ones (as expected) are still moving around pretty slow. One seems to have a little more drainage than the others. Not sure what is normal as I've just recently learned that taking bull calves to the auction is irresponsible management. Trying to do what is right and this is the first bunch of calves I've castrated.