I understand your situation, as that is pretty much the number of cows we have now too.
Years ago, decades actually, I had a local ABS rep that did our AI breeding. At that time we used two rounds of Lutalyse and 2 or 3 days later I watched the cattle for a half hour or so early of a morning and again late of an evening. Anything in heat I would get up and he would come and breed approximately 12 hours after I saw them in heat, we were getting around 80% conception. Fast forward to more recent times, and newer protocols with CIDR’s and Timed AI. The very best best we got was between 50%-60%, most times after it was under 50%. Then as another rep took over, the first year we got a similar percentage. Then the next year we were informed that their calendar was filling up and just had a couple open times left, So I agreed and picked the closest time. It was an unmitigated disaster. We had 60-70 head to breed both cows and heifers. Two reps from the company came to do the breeding.
We had had decent weather up to that point, then that day in May it hit over 90 degrees close to 100. The reps were a couple hours late getting there. So cattle standing around hot and then getting them through the chute.
By the time they’d all been bred I know the timing had passed on a lot of them.
We got about 20% conception. As far as the rebreed we got 0% bred after that so I had to put out the same number of bulls plus it put my calving more stretched out and later.
I had started feeding a better mineral a chelated mineral that a friend had recommended. A good mineral can help with conception rates both with AI and natural service. Another thing is they need to be in good condition, which mine typically have always been.
We tried another route with a different AI tech that I know knows what he is doing after that for my group of 10 registered Angus cows, at the time. It was another hot day, and we’d ordered semen from a different supplier that said he had found semen on a certain popular bull we wanted at the time, but we could only take 5 straws of it and had to take the other 5 of an up and coming son of that bull at the time. I don’t know if there was a handling or storage issue with that semen, but we got 0% conception. That ended my interest in ever having any AI done ever again, I was having to run almost as many bulls to get 50% or more of our cows bred so it made zero sense for me to continue to fool with AI. It’s much easier to turn a bull out than to get cows up 3-4 times through a chute.
I agree with you on being concerned about bringing in leased bulls from a stand point of disposition.
I’m actually considering, my options for future bulls, as maybe I’ll just bring in as decent of a cheaper price bull as I can find or maybe try picking up a good looking bull calf. Sometimes you can find a young bull calf that sells a split at a registered cattle sale. I’ve done that before. You have to have a place to keep him till he’s ready to use though.
There’s also a more of a wildcard idea that I haven’t done but am thinking about it for future is to watch stockyard sales and buy a good looking bull calf through the ring. A lot of unknowns with that angle but with just a few cows it’s something I may consider, for future.