There are a few dependent factors, such as metabolism, age, disease process, current health condition, and what you're dosing for, but start with 1 dropper full and if you're not seeing desired results, add in another dose. For serious conditions, we recommend 3 dropper fulls. Luckily, your pet cannot "overdose" on mushrooms.
We typically recommend the following for mushroom extract tincture dosing:
1ml daily for Prevention
2-3mls daily for Mild to Serious Ailments