Author Topic: how long before I hepto the lambs  (Read 3550 times)

shrekfeet

  • Joined Sep 2008
how long before I hepto the lambs
« on: April 15, 2012, 09:16:52 pm »
question in the title really, how soon/how long can I leave it?

jaykay

  • Joined Aug 2012
  • Cumbria/N Yorks border
Re: how long before I hepto the lambs
« Reply #1 on: April 15, 2012, 09:38:39 pm »
You do them at 3-4 weeks. Earlier than that and their passive immunity from the mum's colostrum interferes with their own immune response to the vaccine. Much later than that and they're unprotected.

In practice, if you do them in batches of 'sheep cycles' for when they were born, then the oldest are 17 days older than the youngest at 3 weeks.

plumseverywhere

  • Joined Apr 2013
  • Worcestershire
    • Its Baaath Time
    • Facebook
Re: how long before I hepto the lambs
« Reply #2 on: April 15, 2012, 09:54:58 pm »
Then a booster 4 weeks later, am I right Jaykay?
Smallholding in Worcestershire, making goats milk soap for www.itsbaaathtime.com and mum to 4 girls,  goats, sheep, chickens, dog, cat and garden snails...

suziequeue

  • Joined Feb 2010
  • Llanidloes; Powys
Re: how long before I hepto the lambs
« Reply #3 on: April 15, 2012, 09:56:58 pm »
Yes
We do the best we can with the information we have

When we know better we do better

jaykay

  • Joined Aug 2012
  • Cumbria/N Yorks border
Re: how long before I hepto the lambs
« Reply #4 on: April 15, 2012, 10:24:36 pm »
That's right Plums, 4-6 weeks later.

dyedinthewool

  • Joined Jul 2010
  • Orpingtons and assorted Sheep
Re: how long before I hepto the lambs
« Reply #5 on: April 15, 2012, 10:54:08 pm »
You do them at 3-4 weeks. Earlier than that and their passive immunity from the mum's colostrum interferes with their own immune response to the vaccine. Much later than that and they're unprotected.

In practice, if you do them in batches of 'sheep cycles' for when they were born, then the oldest are 17 days older than the youngest at 3 weeks.

Hi jaykay

A friend of mine who has had sheep for yonks (as opposed to me who has had them for 2yrs...)said her vet said lambs didn't need Heptavac-ing until they were 3months old...?  she had always done them at 6 weeks previously.

My first born lambs are now 10 weeks old I was going to Heptavac them next week-end (11 weeks) I've only 6 ewes with lambs born through the month of 5th Feb- 1st Mar.

what about withdrawal time as they are quite big, getting on for 35-40kg

It's all very confusing ??? ???
You are never to old to learn something new

jaykay

  • Joined Aug 2012
  • Cumbria/N Yorks border
Re: how long before I hepto the lambs
« Reply #6 on: April 16, 2012, 06:34:45 am »
That's interesting Fleecewife, most folk say the passive immunity would have long gone by then.....Off to do some finding out.

No withdrawal for vaccines - I had exactly the same thought, I think it's programmed into us  :D

Edited to add this article, it's American but it's got a good graph in it showing the decline of passive immunity. I couldn't copy just the graph. vaccinating lambs
« Last Edit: April 16, 2012, 07:01:59 am by jaykay »

 
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