The present invention is directed to litter compositions including a litter substrate and at least one cinnamic or rosmarinic compound disposed on or within the litter substrate which inhibits odor formation. Examples of cinnamic and/or rosmarinic compounds that have been shown to inhibit odor formation include trans-cinnamic acid, cinnamaldehyde, p-coumaric acid, sinapic acid, caffeic acid, hydrocinnamic acid, rosmarinic acid, ursolic acid, carnosic acid, and ferulic acid. The compositions may be free of ethyl cinnamate, and may include a borate, or be free of borates.
