Scratching constantly....HELP!!

  
Beau

1230291
 
 
Barked: Wed Jan 25, '12 6:05pm PST 
Beau is almost 2 years old. Ever since I got him when he was 8wks he has always chewed on his feet. I thought this was just something he did and never worried about it.
However, over the past several months he has been itching and chewing on himself like crazy. It almost never stops, not even at night. We have tried switching his food several times and it always seems to help some or for a little while and then the itching and scratching progressively gets worse again. Has anyone else had this issue??? If so, any suggestions. Beau is miserable with all the scratching and it's making some of his hair come out bc it's so constant.
Monty

I live to dig
 
 
Barked: Sun May 20, '12 10:05am PST 
Unfortunately, alot of dogs with "muted" coat colors like blue (we love our blue merles) exhibit skin problems. Itchy feet can mean atopic allergies that are responsive to cyclosporin treatment.