Has anyone had problems with Royal Canin gastrointestinal formula? We switched yesterday afternoon per the vet's recommendation because of irregularity issues. Within an hour, our 4 year old orange boy was so sick I was contemplating a 45 minute trio to the emergency vet. He lost all bowel control. Spent last night in the bathroom. The only change I can see is a trip to the vet (stress) and the food. He's better today, but we are withholding food until this afternoon. Has anyone else had issues?