Add to drinking water or food.

Guinea pigs:

Add 11 drops to a full, 100ml water bottle.

Add 27 drops to a full, 250ml water bottle.

Add 36 drops to a full, 320ml water bottle.

Or add 20 drops to the food, three times each week.

Chinchillas:

If adding to water, as for Guinea pigs.

Or add 20 drops to the food, twice each week.