Books like Lad, a Dog
Albert Payson Terhune
Lad, a Dog is 286 pages, about 5 hours 15 minutes at 250 words a minute.
7 books to read next
How long each takes
Lassie Come-Home 4.4 h 
Follow My Leader 3.5 h 
The Dog Who Wouldn't Be 3.7 h 
Big Red 4.3 h 
A Dog of Flanders 1.8 h 
Beautiful Joe 5.2 h 
Outlaw Red 3.3 h Bar height shows length. Estimated at 250 words a minute.