One lawn I deal with in Whistler, and a friends lawn near Pemberton have a disease I haven't seen before in Vancouver. Both are well drained but kept moist (one in part shade one in full sun). The lawns are dark healthy green, but there are small patches (or discolourations) of dead grass. The one in full sun almost had a pinkish hue. It is not red thread. It is not a form of grub, nor dogs. It's nothing like dog urine, it is almost physiological. I noticed it first last fall, it dissapeared after power raking in the spring, and in the last 2 weeks has shown up again. Any ideas would be appreciated, Thanks.