If you think the biting of the paws is allergy related to Beef, then change beef to chicken. I don't rotate proteins, I always had good success with staying with one protein. There are different schools of thoughts to rotating proteins.
Val da Tiger
Fuzzybutt the cat.
Neilla the Big White puppy.
RIP Cheyenne - AKA: Digger, CheyChey Girl, Cheyenne Large and In charge. 2/16/02 - 2/27/16
RIP Raya - AKA: Raz-a, Ray a Sunshine, RayBestos, the little one, Silly Girl. 9/21/05 - 6/27/14
RIP Lakota - AKA: Bubba, Big Boy, BooBoo (the other part of the Binky and BooBoo team). 1/19/03-9/19/2011
RIP DeeDee - AKA: DD Poo, Little Bit, Binky (part of the Binky and Booboo team) 6/23/02-6/20/11