In Luke 16:21 why were the dogs mentioned?

who desired to be fed with what fell from the rich man’s table. Moreover, even the dogs came and licked his sores.
(Luke 16:21, ESV)

1. Some see the dogs as further insult to Lazarus.

2. Some see the dogs a sympathetic to Lazarus. Dogs liking people is a sign of affection. Dogs licked sores to promote healing. Some even suggest that the dogs my have sympathized with Lazarus enough that the brought him some of scraps dropped from the table for them.

What is the importance of including the dogs in the account?