I know this is kind of an old topic but my beagle does this as well. She was diagnosed with Bilious Vomiting Syndrome. She will start gulping and frantically licking the carpet along the walls to eat dust and fur. Sometimes she starts eating the carpet. If I stop her from doing this or if she can’t find any dust to eat she will start pulling her own fur out and eating it off of her body, then she will vomit. I feed her 4 meals a day and she also gets Pepcid. If I see her start gulping I will feed her a small handful of her kibble and this almost immediately fixes the problem. It sounds like many of the dogs on this forum are suffering from the same Bilious Vomiting Syndrome that my dog Rosie has. You guys can read about it here: http://www.furrycritter.com/health/dogs/Bilious_vomiting_syndrome.htm
This page also has very helpful info on Bilious Vomiting Syndrome, be sure to click view full answer: http://www.justanswer.com/dog-health/33nu4-dog-will-not-stop-licking-carpet-started-today.html
They key is many small snacks throughout the day! Hope this helps!
