Aye John,
OH! Happy days!
I'm surprised that the lawn didn't go brown as well, as henpen is strong stuff, with lots of ammonia in it and can burn the grass.
At present there is a pile of slaked lime and sewage sitting in a neighbouring field to us awaiting spreading this coming week!!!
With no rain forecasted the odour is going to be STRONG! We already get the occasional whiff.
My best, was treading on my Mum's newly laid, orange fitted hall carpet, wearing my m/c boots, having walked in some molten tar on a hot summers day! I was not popular and the faint mark, after tackling it with various solvents/shampoos lasted until the house was sold back in the early 1980's.
Good health, Bill