Greengate Builders Merchants manager Rob Ross, 40, said the seagull waste had damaged his stock, adding that the amount of waste is "a health risk and very unhygienic for staff".
The problem has arisen since Lancashire County Council signed a contract with SUEZ Recycling and Recovery, which disposes of residual waste on behalf of 12 districts at a site in Whitney Hill.
"We can't sit outside, our cars and outdoor furniture are constantly covered in gull waste and I've found lamb and chicken bones have landed on my car and in my garden.".
In July, SUEZ landfills operations manager Richard Phillips told the Lancashire Telegraph the company was "deploying every measure... to mitigate the number of seagulls in the area".
HOMEOWNERS are "terrified" to go outside as thousands of psycho seagulls fill the skies in scenes akin to Alfred Hitchcock horror movie The Birds.
