Dog smell in the forest?

Have you been to a kennel or an outdoorsy friends house... and you know that dog stink that builds up? Like dog crotch mixed with stale, dehydrated dog urine. Well i was walking through the woods and smelled that. It kept lingering no matter how far i walked so i knew it couldnt be a marking-spree. Was this a tree or plant? Do you know what kind?