Fish oil is thickened using a thickening agent, such as one or both of silica and wax dispersed in the fish oil to thereby facilitate ease of delivery of the fish oil to an animal. The fish oil and the thickening agent form a viscous liquid blend that functions as a delivery medium of nutrients naturally present in the fish oil. The thickening agent is inert to the animal and chemically inert to the fish oil so that the naturally present nutrients of the fish oil are not substantially degraded by the thickening agent. The viscous liquid blend may also be used as a carrier liquid to deliver an added dietary supplement to the animal.
