It is a further object of the invention to provide an assay vehicle suitable for {TAIL ~ use} in {HEAD ~ an animal litter} or bedding 
It is a further object of the invention to provide an assay vehicle suitable for { TAIL ~ use } in { HEAD ~ an animal litter } or bedding
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH