Testing field for toxins??

[little_critter]

In August my mare had a blood test which showed high levels of liver enzymes.
As she was otherwise fit and well the vet suggested we retest a month later to see which way the levels were going. The 2 monthly tests after the initial one showed her levels going down and was nearly back to normal.
Got results for the last one back yesterday and they've started going up again. Both me and the vet are pretty sure it's NOT ragwort poisining.
She has recently moved back into the same field she was in when she had her initial high test result - she was in different fields when her levels were coming down.
It may be a coincidence but I'm wondering if there's something in the soil/grass causing the problems.
Is it possible to test the soil in the field? What would you test for and who would do it?
Sorry for the long post - any ideas welcome.

 

[YasandCrystal]

I would be very concerned and would probably ensure I fed her that Happy Tum by Fine Fettle which is charcoal that removes toxins from the horses gut.

We have a yard close to us that is on sandy soil and several horses in the past few years have died from sand colic from being grazed on there.

Could you move your mare?

 

[Miss L Toe]

It is possible to test for toxins, but it is not always possible to be sure you identify them all, the sample itself is only representative, and if for example she has eaten something which is contaminated, a small fragment, it is not possible to identify this particle.
If she has been tested [blood sample], again they are generally testing for known contaminants/abnormalities.