dogs rolling on decayed matter is just coincidental. due to thick fur dogs roll to either scratch their back or to cool themselves up.
Scavengers eat dead or decayed matter.
compost
Humus
fossil
no dogs tongues do not roll
Decayed plant and animal matter.
Dead Animals and plants?
That would be necromass.
decayed organic matter
decayed organic matter
Decayed organic matter
decayed organic matter