Drs. Foster and Smith is an online pet store (started by veterinarians). Anyway, they are having a black friday sale that is going on right now. Up to 50% off (although I haven't found any of the 50% off items yet).
They're having a Christmas blowout sale now, even better than the Black Friday sale. Prices are up to 75% off. Most are probably in the 20-30% off range. One item I saw with 75% off is a pet stocking (actually I have this, but I paid closer to full price).