injecting heifers to come on Heat

Dunedin

I have 6 nice simmental and Limosine heifers which I am planning to inject in the next few weeks and then AI them and calve them as Autumn calvers next year.

has anyone any experience of Do's and Don'ts of this.

Is there any specific feed or anythign in the lead up to the injection that might help them.


my neighbour did it last year to 5 heifers and none of them came bulling. He had them out and the weather was a storm of wind and rain after he injected them and he blamed that.


any suggestions appreciated.

ceannfort

The advice given to me by my vet for this was don't inject on its own as results are very mixed. much better results if you implant a CIDR and inject.

whelan1

ceannfort wrote: »

The advice given to me by my vet for this was don't inject on its own as results are very mixed. much better results if you implant a CIDR and inject.

or watch them for their own heat and work from that

ELP

ceannfort wrote: »

much better results if you implant a CIDR and inject.

I have a couple of heifers myself and dont seen to be able to detect them on heat.
I was thinking of trying the CIDR and inject as above.
I just have a couple of questions about it when do you inplant the CIRD then how long after do I inject and when after do I AI them.
Where do I get the products is this A vet job or the AI mans or do I do it myself.
Thanks in advance for any answers

Sam Kade

ceannfort wrote: »

The advice given to me by my vet for this was don't inject on its own as results are very mixed. much better results if you implant a CIDR and inject.

From experience I can tell you that CIDR is useless for heifers. Less than half of the heifers treated will not hold to the first service. The injection works better for heifers.

You should tailpaint the heifers and look for signs of heat for 7-9 days then inject any that didn't come on heat and serve them when observed in heat 3 days+ after injection. Any that don't come in heat should get a second injection 10-11 days after the first injection. I used this method a few times and ended up with the all heifers calving within 10 days. Synchronizing is only an aid and only makes heat detection easier as most the heifers come in heat in 13 days.

greysides

How does the injection work if the heifers aren't cycling?

Sam Kade

greysides wrote: »

How does the injection work if the heifers aren't cycling?

http://www.lutalyse.com/Lutalyse.aspx?country=US&species=BF&drug=LT&sec=400#seq4

greysides

By that I meant hormonally cycling, rather than not showing signs of heat i.e. anoestrous.

redmeadow

I've syncronised heifers for past 3 years with this method with excellent results. It wont work on heifers that aren't cycling and ideally they should be on a rising plane of nutrition at time of ai. It also wont work on any heifers that were on heat in the previous 7 days but after that results should be good.

greysides

redmeadow wrote: »

... It wont work on heifers that aren't cycling ...

That's what I was getting at, it's a point not to overlook.

A CIDR/PRID would be a better approach in those cases.

babybrian

What we usually do is observe the heifers 3-4 weeks before AI and then inject whats not showing signs and usually they will show signs after that but if not then its pretty obvious that something is wrong and thats when we get the vet...So basically we try get them in calf by starting at the chepest option, I think injection is something like €7/injection and CIDR's or PRID's would be up around €70-80 euros including vet call out. Also this year or vet advised a hormone injection to get a cow cycling, it worked so might try that again instead of PRID's, it has the same hormone I think but cheaper.

sue_

I put CIDRs in 5 heifers and injected them 24hrs before they were removed. all came bulling in 48hrs. 4 held to 1st service. It is more expensive, but its very reliable. All the same heifers should be cycling so inj should work. if they are not cycling might be something wrong - maybe in calf already!

greysides

sue_ wrote: »

.... if they are not cycling might be something wrong - maybe in calf already!

Good point. The injection would soon put paid to that.

sh1tstirrer

greysides wrote: »

Good point. The injection would soon put paid to that.

So would the cidr/prid as you need to inject them when removing it They used to have a tablet that was put in with cidr instead of injecting but that was banned years ago.