PUUR Pollen contains dilutions of all prominent grass and plant species to desensitise horses, dogs and cats against allergens from these grasses to diminish (or stop) the allergic reaction. It is an animal feed supplement which usually takes 2 seasons to get the body used to the grass and pollen species. PUUR Pollen is given the first three weeks every 5 days, and from the fourth week you can decrease the dosage to once every 3 weeks until the end of the pollen season.