POLICE have warned angry parents against vigilante action after they threatened to post dog excrement through a negligent pet owner’s letterbox.

A group of mothers with children at Kyson Primary School, Woodbridge, have become so incensed by the amount of dog mess on the pavement outside the school gates they decided to take action.

Posters were put on lampposts on the roads neighbouring the playground asking for help in tracing the culprit and his pooch. Each leaflet was accompanied by a plastic bag to encourage the owner to clean up.

The posters said: “Ignorant dog owner. You might not be able to read this as you are obviously of very low intellect. Clean up after your dog. Don’t let it foul the pavement for all the young children and mums to step in.

“You know who you are.

“Perish the thought you might find it posted back through your letter box. We will find out who you are ... ”

Homeowner Margaret Brown, who lives close to the school, said she thought the message was an important one.

“There is nothing worse than stepping in dog muck and this area is always busy with kids going to and from school,” she said.”

“They step in it and then carry it into the classrooms and the assembly hall.”

A spokeswoman for Suffolk Constabulary said it was important people reported the anti-social behaviour but warned against vigilante action.

“Incidents should be reported to ourselves or to the council who can issue the offender with a fine,” she said.

“We need people to gather information so we can act on it rather than taking matters into their own hands.”

A spokesman for Suffolk Coastal District Council said the authority had already received complaints about the dog mess.

“We are currently investigating it with a view to finding who is responsible,” he added.

The offender could be issued with a fixed penalty fine of �80 for allowing their dog to foul the area without clearing up, he said.

If the problem persisted the owner could be taken to court and fined up to �1,000.