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Old 19-10-2008, 08:43 PM
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BAER Hearing Test

Hi

We wondered whether we could ask the advice of some of the breeders on this forum.

We recently took one of our Border Collies for a BAER hearing test and it came back "impaired hearing - 60 db".

Needless to say we were quite shocked, as our little girl is 3 years old and we hadn't even realised! Shes always been a bit scatty/vocal, but we put it down to her nature.

Would there be any circumstances that could cause this reading, apart from bilateral deafness? As you can appreciate, we want to make certain she really is deaf, before having her speyed (she was purchased as our foundation bitch).

We know this sounds really daft, but she really does give the impression she can hear at times

Thanks
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Old 21-10-2008, 03:48 PM
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Re: BAER Hearing Test

I suppose you could always opt for a second opinion but unfortunately I don't think there is much else you can do for hearing tests. Sometimes dogs seem to be fine but they are picking up on vibrations and body language. I know it must be hard but if your dog has hearing problems then the decision about breeding her must surely be, that you should not. I had a friend with Australian Cattle dogs and she had all her pups baer tested and one was slightly suspect so she had to take it back and it was fine a few weeks later. Well done for getting the tests done though so many people don't bother.
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Old 21-10-2008, 04:12 PM
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Re: BAER Hearing Test

I've heard about these test before. I think i've read that dalmations have this test? are there any dalmation breeders/owners on this site that may be able to help you a bit more?
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Old 21-10-2008, 05:08 PM
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Re: BAER Hearing Test

im often up at kendford having pups baer tested, if it come back as that then sorry to say then it right, these machines for the test normaly are right.
if they are deaf in one ear then theres a chance any pups could be ok but i wouldnt like to risk it breeding from a part deaf dog.
and what a lot of people who have collies they are finding more and more collies are deaf,the figures for them are up as more people now are having them tested.
infact ANY animal which has lots of white on them can be deaf and should have the test done, there's one excption to this and thats the westie's
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Old 22-10-2008, 01:19 PM
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Re: BAER Hearing Test

Congenital deafness occurs as a result of degeneration of sensory inner ear structures in one or both ears within a few weeks of birth. It can result in total permanent deafness in both ears (bilateral) or in one ear (unilateral). This is a hereditary condition and is believed to be linked to coat colour as breeds with white coats and blue eyes are most affected e.g. Dalmatians, Bull Terriers, Australian Cattle dogs. Research has shown that if even one parent is unilaterally deaf the chances of any offspring being unilaterally or bilaterally deaf are almost doubled. Breeders are therefore advised to have the hearing status of both breeding dogs and litters assessed.

There are clinics where owners and breeders can bring their puppies or adult dogs for BAER testing. They see mainly Dalmatians, bull terriers and border collies and results show an incidence of over 14% dogs and puppies either bilateral or unilateral deaf. This is an average figure which varies considerably between breeders.

Unilaterally deaf dogs can make good pets but breeders are strongly advised to have them spayed/neutered as these dogs will pass on their deaf genes. It is only by continuous and dedicated testing by responsible breeders that the incidence of deafness within affected breeds will be reduced.
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Old 22-10-2008, 08:11 PM
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Re: BAER Hearing Test

My dog is totally deaf...best pet ive ever had in my life and im going to adopt another one in the future thats a dead cert.

ild never breed from a dog thats got any form of deafness.
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Old 23-10-2008, 07:29 PM
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Re: BAER Hearing Test

Thank you all very much for your replies.

Please note we are responsible breeders and did state in our original post, we would not breed from her! We will be keeping her, no matter what the results!

The question was, could anything have caused the reading, ie being distressed, etc
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Old 23-10-2008, 07:48 PM
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Re: BAER Hearing Test

no as they put the tiny pins by the ears and the head fone it reads
they only time you will get a wrong reading is if the pin comes out, but then the person doing the test will see that on the screen and start again.

when ive taken up they have no why been in any distress as they are all half alseep when they are doing the test, they are all put in a big pen to let run round have a drink and food if you wish, then as they start going to sleep then they do our tests, even mother is there when we go up,
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Old 29-10-2008, 04:55 PM
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Re: BAER Hearing Test

There is a very outside chance that there was a calibration error on the testing equipment - that could either be human (operator) error or an instrumental misfunction.

I'd suggest going back to the breeder of your bitch and ask if either of her parents are now showing signs of deafness or have been tested. If the parents are tested and OK then the instrumental error is more likely.

Very much a long shot but it can and does happen with calibrated instruments.
How much is the test? You might want a second opinion.

Sgurr
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Old 08-12-2010, 12:14 PM
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Smile Re: BAER Hearing Test

I would agree with sgurr's comments re tester/calibration errors.

I am an audiologist and perform a more detailed version of this test on newborn babies. Based on my experience, other possible explanations are the presence of a temporary or fluctuating hearing loss due to outer or middle ear infection or obstruction at the time of testing (I presume the testers rule this out prior to testing). Also, as I understand, dogs are tested with a click stimulus which incorporates a range of particular pitches. It's possible that the dogs hearing is impaired for the pitches tested but may not be so for higher or lower pitches of sound. This might explain the appearance that the dog hears something.
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