Read our Privacy noticeMillions of doses of pet flea treatment are being applied unnecessarily each year, potentially causing widespread damage to the environment, peers have warned. The House of Lords Environment and Climate Change Committee is calling for a ban on the general sale of off-the-shelf and unchecked online pet treatments for fleas and ticks. open image in gallery Pet flea treatments are released into the environment from homes and are potentially causing widespread damage to nature, in rivers and other aquatic systems. They also raised concerns about how close the pet health industry is to the regulatory and advice-setting frameworks. Baroness Sheehan, chairwoman of the committee, said: “Our report raises serious questions and concerns about the environmental risks of pet flea and tick treatments as well as how they are sold to pet owners.