Pembrokeshire dog owners are some of the worst in Wales at cleaning up after their dogs.
New figures reveal that nearly a quarter of streets in the county contain dog faeces.
Now Pembrokeshire's Assembly Members are calling on the county council to crack down on lazy pet owners.
"Pembrokeshire has the fourth highest dog fouling rate of any county in Wales," revealed South Pembrokeshire AM Angela Burns, who is also Shadow Welsh Environment Minister.
Preseli Pembrokeshire AM Paul Davies added: "Not only is leaving dog poo lying around unpleasant and unsightly but it is also a serious health hazard, especially for children.
"All faeces contains bacteria that can cause stomach upsets if ingested but the greatest risk to public health from dog faeces is toxocariasis – which can cause epilepsy, asthma and even blindness."
The high rate of dog fouling in the county was revealed by a survey carried out by Keep Wales Tidy.
They found that 24.4 per cent of Pembrokeshire streets surveyed contained dog faeces. In Carmarthenshire the rate was just 4.8 per cent and the national average was 14.2 per cent.
The Assembly Members praised Carmarthenshire County Council for its crackdown on pet owners who don't clean up after their dogs.
Since launching the campaign the council has issued more than 200 on‐the‐spot £75 fines and prosecuted eight people for non payment. The highest fine imposed by magistrates was £522.
"Carmarthenshire is sending out the right message that dog fouling is unacceptable and these figures are proof that the Council's actions are making a difference," said Mrs Burns.
"I have two small children and three dogs myself so I can empathise with both pet owners and parents. But dog fouling is a serious issue that needs to be tackled."
Mr Davies added: "Pembrokeshire is a wonderful place to live but areas are being spoilt by llazy pet owners. Those who don't clean up after their dogs, or even worse, put dog poo in little plastic bags and then leave the bags on the verge, need to be taken to task."