grammar - "can't do anything except eating" vs. "can't do anything except eat"

1. My dog is so lazy. It can't do anything except eating food.


2. My dog is so lazy. It can't do anything except eat food.

Which one is right?
We asked this question in two different forums but we received different answers. Some said #1 is correct and some said #2 is correct. Look at their responses:

A selection of answers taken from WordReference

• No. Except or but is followed by the bare infinitive here @e2efour



• The clue is in the first part of the sentence:
  The structure is "they could not except .
  I suppose, in full, it would be They couldn't do anything except they could blame others. @PaulQ


• Q70. He is not interested in doing anything except watching movies
  You see now? Here, "ing" is used instead of bare infinitive. I think it's because of the word "doing"
  Am I right? (The OP @xiaoen)


• If you say watch, it could mean that he avoids watching movies at all costs.
  If you say watching, it means that he is only interested in watching movies. @e2efour

However, in the The Free Dictionary Language Forums > English Grammar, someone else offered the following explanation.

• 'Except' is a preposition.
  My dog is so lazy. It can't do anything except eating food
  @Víctor Lplz

Now we are confused. Which one is correct, and why?

Thank you.