Cute puppy, have you ever had a heeler before?
Becky
They are nice, good dogs, except for the wanting to "heel" everything. The SIL's gets tied up when we lounge horses. He just won't quit.
If Rusty is acting fine any other time, then the only thing I could think of is, he is lazy or there is a tack problem. You said he was shaking his head, might be a tooth/bit problem.
But, I have desperately wanted one, ever since the FIRST time, one of our horses got loose. LOL!!! And every time AFTER THAT, it made me even MORE determined to get one. (call me lazy, outta shape, whatever....but chasing/hunting down horses sux)