Probiotic compositions that comprise one or more bacteria species in spore form, a thickener to form a stabilized suspension and to preferably act as a prebiotic, one or more acids or salts of acids, and optionally a water activity reducer. A system for delivering probiotic compositions by gravity feed or non- contact pump to a point of consumption by a plant or animal, preferably in conjunction with acidified drinking water, comprising a collapsible container with attachable tubing that prevent contamination of the probiotic composition within the container. Delivery may be actuated in response to a timer, motion detector, fluid level sensor, RFID tag, or other mechanism to periodically or continuously dispense a dosage of probiotic composition directly to the soil surrounding a plant or to the water or feed for an animal.； A method for increasing beneficial bacteria in an animal's GIT comprises adding probiotics to acidified drinking water.
