Why?
Lush Lawn Lover?
Oh, BTW.... Welcome to BYC! @the_peanut_coop
Where in this world are you located?
Climate, and time of year, is almost always a factor.
Please add your general geographical location to your profile.
It's easy to do, and then it's always there!
How often?
If only one birds lays funky eggs, then it might just be a coincidence,
or only that bird is eating the pellets..
Why?
Is he your landlord?
I would tell him to stop spreading fertilizer in your yard.