Rhinelander, Wis.

San Diego-based pet supply chain Petco is set to buy a competitor, online pet product retailer Drs. Foster and Smith. Petco announced its agreement with the veterinary-owned company on Wednesday. Drs. Foster and Smith, based in Rhinelander, Wis., is widely regarded for its leadership in pet care and education, and its expertise in prescription medications for pets of all kinds.