Food allergies are often linked to the hyper active behavior noticed in the dogs. Added colors, preservatives, and high fat diet might cause such food allergies in the dogs and hence, one has to be careful in providing new kind of diet to their dogs and closely monitor the dog for any signs of allergy.
There are many occasions that food allergies might be diagnosed in the dogs but the dog may have other problems like pancreatitis. To rule out the food allergies, observation your dogs everytime you feed them, look for reasons to link the signs of dog with food given, specific signs encountered, differential diagnosis etc. are the important features to be given emphasis.