Ingesting plastic?

[Linds]

Ok... so I have had to change the way I ventilate my rubbermaids due to space. The old rubbermaids (breeder cages) have screen tops... the new ones though need to be stacked so I just drilled loads of holes all around the top 3 - 4 inches of them (they are 9" high total). What I was wondering is what happens if the rats actually ingest the burring (my bits were a bit dull hence the holes arent finished off nicely - lol... way too many holes to do it by hand like I do for my snakes)? I'm not sure if they will even bother doing anything, and if they do I'm not sure if they will just file it off or if they will actually ingest it. If they did happen to ingest it would it do any harm? To the snakes I mean... rats seem to be indestructible when it comes to eating stuff like that...lol!

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