Quest Gel? Moxidectin, provides horse owners worldwide with effective control against a broad spectrum of internal parasites, including bots. Quest delays reappearance of strongyle eggs for 84 days, permits parasite and bot control with only four treatments per year, is the only dewormer that kills small strongyles in the encysted state with a single dose, and is formulated as an easy-to-use, clear gel that offers less mess and less stress on horses and their owners. This product should be given to foals, ponies, and miniature horses with caution because overdose can lead to serious reactions.