I'm in the same boat as you, mostly it's fox poo, certain dog poo & cat poo if it's in the garden, they are high value to them, smelly sardines don't work, bracken's habit is just on one nature reserve any where else he dosen't do it, wish I knew the reason why? On the reserve that is the problem he is on an extending lead! Hoping he'll grow out of it, in the meantime he is on the best worming stuff out!