Stubborn with dog about fishbone initially?
I believe the answer is:
hidebound
'stubborn' is the definition.
(thesaurus)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for hidebound that I've seen before include "Rigid" , "Narrow-minded - ultra-conservative" , "Restricted by conventional ideas" , "Bigoted" , "Splash (with liquid)" .)