Plenty of outfits treat bull turnout like the last chore of breeding season. Semen-tested in May, hauled to the cows in early June, gate shut, done. Except the bull that passed a breeding soundness exam in the corral can still come up lame, get his pizzle wrecked, or lose a fight and stop working three weeks into a nine-week season. None of that shows on the bull’s face. It shows up in a run of open cows and a strung-out calving next spring.
The cheapest insurance you have after turnout is a set of eyes on those bulls every few days. It doesn’t take long, and it catches the wrecks while you can still do something about them.
What actually goes wrong out there
Injuries top the list. Bulls fight, especially young ones and especially the first week or two after you mix a battery together. A bull can get rode down and come up with a swollen sheath, a hurt back, or a torn-up penis that keeps him from breeding even though he’s still interested. Foot problems are common after a wet June — a bull carrying two thousand pounds on a sore foot in soft ground isn’t chasing cows uphill. And heat matters. A stretch of hot, still days can knock sperm quality back for weeks, so a bull that tested fine in May can go temporarily sterile in July and recover by the time you’d never know.
The tell is behavior. A working bull follows cows, checks them, breeds them. Watch for who’s hanging back at the water, lying off by himself, or standing while the others move. A bull that won’t get up and travel is telling you something. So is a bull with a dropped, swollen, or bloody sheath.
Ride through the breeding bunch and look for the other half of the picture too: cows coming back into standing heat. A little riding early is normal as cows cycle in. But if you’re still seeing a lot of mounting activity three and four weeks into the season, cows aren’t settling, and it’s worth figuring out why before another cycle slips by.
Ratios and single-sire traps
Bull power is the other thing that bites people quietly. The rough rule most of Montana runs on is roughly a cow per month of the bull’s age up to a mature ratio, but big country changes the math. A bull that covers 25 cows in a flat 40-acre trap won’t cover the same number spread across a rough section of foothill range where cows scatter into the timber and coulees. Rougher and bigger means you need more bull, not less.
Single-sire pastures carry the most risk, because there’s no backup. If that one bull goes down and you don’t catch it, every cow in that pasture is exposed to nothing. Running two or more bulls together gives you insurance — if one quits, another picks up the slack — but it also means the fighting sorts out a boss, and a whipped subordinate may not breed much. There’s no free lunch. The answer either way is the same: check them.
Keep a couple in reserve, and check late
If you’ve got the bulls, keeping one or two sound spares back home earns its keep. The day you find a bull with a swollen sheath standing off by himself, you want a replacement you can haul out that afternoon, not a two-week scramble to buy or borrow one. A bull pulled and swapped in week four still salvages the back half of the season. A hole you don’t fill until preg-check salvages nothing.
When you pull bulls at the end of the season, give them a real look-over instead of just running them home. That’s when you’ll find the foot that’s been bothering him, the condition he’s lost, and the injuries that’ll need to heal over the winter before he’s any good next June. A bull that comes home thin and gimpy needs the whole off-season to get right, and you’d rather know in August than find out at turnout.
Nobody wants to add another job in the middle of haying. But the open cows you find in the fall got that way in June and July, and most of the time something out in the pasture was trying to tell you. Riding through every few days is how you hear it while there’s still time to fix it.
