A doghouse at an angle can get that way quick from a digger, especially if the house is on legs to keep it off the ground. I throw rocks in the hole where the leg of the house is. I lost a dog in the woods for one hot day and night and his hair was matted overnight. From the stress of being lost and it being so hot he shed his undercoat in just one day. Males often urinate in the dish if it is left near them.
Some mushers feed their dogs by dumping dry kibble on the roof of the doghouse a few times a day.
The dogs inhale the food right away and they don t have to deal with dishes. It s a quick way to feed 50 dogs. I wonder how long you showed up after the owner left. Perhaps he left a few days food in anticipation of you being late. That would explain a lot of the feces and the partial dehydration.