I have a query about a children’s book from the 1950’s or early 1960’s. I read the book in 1965 or 1967. 
The story is about a lonely city boy who is failing math. School ends for the summer and he goes to visit relatives on a farm.  He gets a hound dog to raise, and he finds self esteem and joy in the process. 
The story mostly revolves around this little hound dog and the boy’s experience with the dog on the farm. 
It’s not “daddles” or “old yeller” or “the fox and the hound”,  or any of the well-known hound stories.  It was a chapter book with a solid color cover and some b & w line drawings.  I thought the title was something about the little hound dog, but my previous searches haven’t borne that out.