nerdle
n.β Β«When I worked in the vet. hospital (animalsβnot soldierslol) we used “nerdles” in the litter boxes of cats from whom we needed a urine sample. It gave the cats something to dig around in and we could easily collect the sample when they were done.Β» ββRe: OT. Elephants!” by Liz Hampton Usenet: rec.crafts.textiles.needlework Jan. 25, 2002. (source: Double-Tongued Dictionary)