difference thoroughpin and bog spavin

[daydreamer]

Hi,

I just wondered if anyone could explain what the difference is between bog spavin and thoroughpin. I think they are both swellings due to synovial fluid and I think the swellings are in different places but why?? I have my anatomy books at the ready so am happy to try and decipher in depth answers!

I am revising for a horsey exam and need to know about lots of so called common leg problems but I don't remember seeing many of them! If anyone has any good pics of bog/bone spavin/thouroughpic etc and would be willing to send them to me i would also be grateful.

Thanks.

 

[almorton]

bone spavin - hard swelling (although may only be visible on xrays) found on the inside of the hind leg, find the chestnut and its normally level and a bit more central. caused by DJD of the hock joints, the bones fuse and this helps stabilise the joint and pain is reduced once fusion occurs, some minor loss of range of motion may be observed
Bog spavin - soft swelling on the middle / front of the hock, synovial distention, may be several causes, and is simply a term for the swelling, not the underlying problem.
thoroughpin, again soft fluid swelling, found either side of hock, can be pushed from one side to the other normally ie inside to outside!
all 3 often due to conformation.
no pics on this computer but should be plenty on google images? hope that helps!