Black Walnut & laminitis in horses

[Guest guest]

Hi All,

 

Many thanks to those who replied re the problem listed by Beverly

McEwen. I collated the replies and forwarded them to AAVLD.

 

Below is the feedback from AAVLD.

 

Best regards,

Phil

 

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

 

Beverly McEwen [bMcewen]

Black Walnut: Replies via

 

Thanks for all the data from VBMA and to for compiling

them. Thanks also for the kind offer to send specimens to Purdue - very

much appreciated! (Will be in contact via phone).

 

In answer to one of the questions listed - it was the actual wood

shavings rather than the nuts/seed casings that was in the bedding.

Happy Canada Day & Happy 4th of July to our friends in the US! Bev

 

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

 

" Francis D. Galey " <FGaley:

 

Phil has done a pretty good job of summarizing the literature w.r.t. black

walnut. I might add that so far, the only documented cases involve the

heartwood of the Juglans nigra.

 

There is one report of toxicosis / laminitis due to the English walnut (J.

regia), but that was not documented and when I followed up it turned out

it well could have been J. nigra. Based on literature and some of our

findings, I do not think that Juglone per se is the active toxin. It could be

a form of Juglone or one of the other napthoquinones that are abundent

in the heartwood.

 

The evidence is that the heartwood is the most hazardous part of the

plant. Feeding bark and pulpwood did not seem to have the same

effect. Also, it seems that whatever is in the walnut causing laminitis

may be sensitive to either light or drying. It seems, again based on case

evidence, that walnut shavings may lose toxicity if left outside to dry/sun.

I would NOT risk trying to detox it, however:). ID of the wood shavings

is best. It can be done based on characteristic grooving, breaking

patterns, crystal location, and color of the shavings. Good luck with this

case. Francis

 

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

 

 

 

Best regards,

 

 

Tel: (H): +353-(0) or (M): +353-(0)

 

 

 

 

Ireland.

Tel: (W): +353-(0) or (M): +353-(0)

 

 

 

" Man who says it can't be done should not interrupt man doing it " -

Chinese Proverb