i have a 6 mos. old westie male. for the past few months, he started scratching to the point of losing hair on one leg & biting at the base of his tail. the vet thought it was the solid gold food. switched to wellness for a few weeks then he had me try blue. the same problem scratching and abnormal bowels. he has been on a bland diet for a month. also, he would vomit foam around 5 or 6 a.m. he has been taking reglan before bed, along with a small bowl of bland food (beef, rice, yogurt). vomiting stopped. however, today, his stool was like that of a dog with colitis. i took a sample to the vet and he agreed. (also checked for parasites and he is clean). he gave me fortiflora by purina and metronidazole 250 mg - 1/2 tab twice per day. he is now so sleepy since the fortiflora, he won't come out of his cage. we're talking a westie puppy - not normal. i feel that there is probably a very simple explanation to his itching and his bowels, we just need to hit upon the correct answer. any input that anyone has for me would be greatly appreciated. thanks.