Could I just estrumate and stick scratchcards on them on day one and estrumate anything not bulled again a week after
Yes, you will get a lot bulling on days 2 and 3 then est remainder on day7. Don't be disappointed if they all don't come as they may be prepubesent
Planning on estrumating the heifers this week, was wondering is early feb too early for heifers to be calving,wouldn't buyers prefer an early calving heifer.
Do you AI as bulling if they are showing no sign of heat
in option 2 is there any importance to estrumate on day 7 or can it be at anytime during the first round of breeding
i ask as this is my first year ai'ing heifers, and there arent as many as i would like around, so was going to sync once then let the bulls in, at the moment im 10 days into breeding, and about 45% of them have been served
How can you ai them if they arnt showing signs of bulling
Get them drunk. :-)
Ah no, it's called fixed time insemination.
Blind luck, and just AI them at a fixed time following injection (I can't remember the timeframe, maybe 48hours?).
But unless your heat detection methods are brutal, having to resort to this seems abit counter productive as the heifer could well just either show very poor signs of being in heat, or have problems inside her, and would be likely to continue to have problems down the road. We must have spend a fortune on afew cows last year trying to get them back in calf, coils/estrumate/recepitol, eventually got them in calf but on hindsight would have been way less hassle to have just flogged them on while the cull cow prices were good.
Oh right never heard of it
Fixed time AI it's called. AI them twice 72 and 96 hours after second injection. I know a farmer that did it and only two went incalf out of twenty.
Owch, that must have been an expensive exercise, surely it's only be worth while if you did yourown AI, and had a load of cheap straws.
Early Feb is perfect time for heifers. If I were buying I would only buy Feb calving
Fixed time Ai only about 20% effective.
I hope fixed time Ai is different to estrumating
What made it even more expensive for him is that he had to AI the heifers that didn't go incalf a third time and later in the season as he presumed that they were all incalf until he scanned them.