Several times over the past week, Shaylea has regurgitated her kibble. It is usually several hours after she has eaten. She has no other symptoms of feeling ill and ALWAYS goes back to whatever she was doing before (usually running, jumping or playing!). I switched their food recently to a different variety of Timberwolf just for a change. The other dogs are fine. Could this be the reason? What else would cause this? Thanks for any advice.