Hello, I also live on Trilby. Are you sure it isn't the foxes? We have had poo near our doorstep and front garden as well. At the moment we do seem to have about 6 foxes living along the back alley between Trilby and Vestris (you may have heard them at night!). They took to drinking our milk from the milkman for a while (We now have a box)... which was not really a bit deal but the poo is gross!