The invention provides odor control systems having customizable aroma and malodor control compounds. In a general aspect, the odor control system includes a litter box and a programmable dissemination device attachable to the litter box. The programmable dissemination device is adaptable to receive at least one odor control cartridge and disseminate the contents of the cartridge. The odor control cartridge is a fragrance cartridge or a malodor counteractant cartridge insertable into the programmable dissemination device. Alternatively, the odor control cartridge can include a fragrance and a malodor counteractant in the same cartridge.