During this last year we have progressed in our abilities to make diagnostic toxicological analyses by TLC. Two which I will present are the analysis for Lincomycin and Slaframine.(1) The former, a drug which is very bad for horses, and the latter, a naturally occurring mycotoxin which has had a very large effect on animals this last year.(2) In addition to cases involving closer pastures, this last year alfalfa pasture and hay and grasses have been involved.