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