First of all, listen to Cowboy and not me.
But, I will tell you how I have used Lutalyse for years. Again, like Cowboy said, you can't overuse this stuff so use with discretion.
Like Cowboy said, you have to have a functional CL.
One injection of Lutalyse will statistically get about half the cows to come into heat. If they do not come in, I repeat the Lutalyse in 10 to 12 days. If I do not see them in heat after the second dose, I will breed at 72 and 80 hours and keep my fingers crossed.
If that doesn't work, I have someone a lot smarter and more experienced than me put THEIR arm in the southbound end of my northbound cows
We all try to do a lot of things on our own to save money. But a cow that isn't putting a live, healthy calf on the ground is taking money out of your bank account, not making deposits.
My Dad taught me that a cow will make you pay. You can pay now or pay later, but she will make you pay. So pay up front with the right housing, feed, mineral, vaccination program, fly control, heat detection, etc. If none of those things are getting your cattle to cycle, then pay for some help. In the long run, you will get to the bank sooner.
For the heifer you saw bleeding: she was probably in heat 3 days before. Wait 10 to 12 days from her HEAT date and give her Lutalyse (she needs time to form her CL).
With all that said, I am having a terrible time catching cows cycling this spring. I have one cow I just put the third embryo in 10 days ago. She has been checkad and seems to be in great shape. But, the trailer is hooked up to the truck and the yards here has a sale every Thurs.
I am giving a couple cows until Monday to cycle on their own and if I don't see them in heat, they get Lutalyse.
Well, good luck to all in getting those cows to cycle and getting them bred.
Got two inches of rain last night and had 2 1/2 inches last week. Bah humbug! Will gladly send some to those of you in need.