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  I have no idea but if it was the first time using this toothpaste I would notuse it again. Something might be wrong with it or your pup had a bad
 reaction from it! Does your pup eat chicken normally? I have only used
 the mint flavored four paws brand. The thought of chicken or liver flavored
 toothpaste is a turn off for me. Yuk! LOL
 Try putting a pit on your tongue and see if it burns you?
 I hope not but I would not use it again.
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