I feed on sheets of printer paper to prevent what you had but I have had substrate in their mouths before. They will usually drink and its fine but if they got a lot, you might have to intervene. Gina had a mouthful of Eco Earth to the point she couldn't close her mouth at all. I had to wipe out as much as I could with a paper towel and Q-Tip. Then use the center Q-Tip stick to prop her mouth open and hang her head down and use a spray bottle and flush her mouth out. Had to do that twice. After that, I swear I'm never using Eco Earth again. Two times I've used it and two times I've had issues.
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