Photosensitization in calves

[PREES]

I have not put a picture up as I know some members are sensitive to unsuitable pictures on a public forum but we have a calf with skin peeling through this condition. It is the second year running we have had the problem so I was wondering whether anyone had come across it and come up with preventative measures? They are grazing clean pastures and are amongst a large group (80+) with no other calves showing ny symptoms! They loose a lot of condition but last year's calf recovered after a period indoors. Quite distressing when it appears over just 24 hours

 

[kverneland es 80]

this is what we are blaming for it

Hypericum perforatum - Wikipedia

en.wikipedia.org

 

[PREES]

Yes so are we but as yet we haven't found any in the field and strange that only one animal seems to have been affected, unless maybe one plant is sufficient to cause it and she has eaten it! Question is whether there is anything we can do to minimise the risk of it happening again!

 

[Sparkymark]

Ingesting ragwort causes it. When its at the leafy stage its not as visible as when the yellow flowers are out

 

[Bald n Grumpy]

Thought it was St John's wort had it with a completely white cow
Spent weeks cutting of dead skin in a dark shed

 

[kverneland es 80]

Thought it was St John's wort had it with a completely white cow
Spent weeks cutting of dead skin in a dark shed

this is what we are blaming for it

Hypericum perforatum - Wikipedia

en.wikipedia.org

that is st johns wort

 

[kverneland es 80]

Ingesting ragwort causes it. When its at the leafy stage its not as visible as when the yellow flowers are out

interesting, we would have a little of that in the paddock where we think the issue arose

 

[Kevtherev]

St. John’s Wort seen a Charolais cow really poorly after grazing it in a ditch bottom big lumps of skin blistering and red udder terrible sore.

 

[organicguy]

If ragwort really does cause there a hell of a lot of cattle which will have a problem in the future as ragwort is everywhere around here.
seen cattle nibble off the tips but not had a problem.
Only had an issue when cattle have got into ditches or behind guard wires.