Hi

Has anyone had an allergic reaction to this product? 

I've been giving it to two of my dogs for about a month and they have both developed an allergic pyoderma.  My bitch, who has had this in the past once before, is quite bad, but the boy only has a little.  I am asking because the vet has advised trying exclusion and as this is the newest thing they have both had within the last two weeks I thought I would start here. 

Thanks in advance for any advice etc.