The only thing that comes to mind is the Soṇa Sutta (AN. iii. 221-2), where the Buddha describes the five ways in which dogs are better than brahmins, owing to the latter's discarding of their ancient customs. It's one of a series of suttas where the Buddha decries how the brahmins of his day had degenerated. To paraphrase:
1. Dogs only have sex with other dogs, whereas brahmins, though formerly having sex only with other brahmins, nowadays will do it with women from any caste.
2. Dogs only have sex when the bitch is in season, whereas brahmins will do it at any time.
3. Dogs don't buy and sell bitches, but rather, will mate according to mutual affection. Brahmins do buy and sell lady brahmins.
4. Dogs don't hoard silver, gold, grain etc., but brahmins do.
5. Dogs go looking for their evening meal in the evening and their morning meal in the morning. Brahmins stuff themselves silly and then keep the leftovers for the next meal.
"Verily, bhikkhus, these are the five ancient brahmin dhammas that are nowadays practised by dogs but not by brahmins."