My Gilbert had head tremors one day about a year ago, the only new thing in his life was a chicken flavored benebone. I took the Benebone away and never had a head tremor since. He eats Acana for breakfast and Primal for supper (with chicken in the protein rotation). He just turned 3.
Gilbert started having this issue this summer all of a sudden. The only new thing we had given him was a benebone wishbone (chicken flavor). Took the chew away and they stopped. The benebone definitely got thrown away and the tremors have not been back (knock on wood). He usually gets raw...
I think Bear looks great! He sounds like he's about the same size as Gilbert. Gilbert is only about 20 in at the top of his head ..lol and weighs in between 56-58. Definitely ALL chest!