Karen,

Just thought I would add (a bit late) that Lamb and Rice frequently isn't used for allergies anymore by many vets. Too many pet food companies started marketing the food for 'good skin' selling it everywhere and many pets have now been exposed to what once was a unique protien. Because of that more rare protien sources are being used for food trials (kangaroo, venison etc) or the Hills ZD which is a manufactured protien if I understand the terminology of it correctly.