256 in hardcover, I'm not sure if it's the same in paperback. Probably about the same amount of pages in both.
Hope this helped :)
The Good Dog has 243 pages.
182
A Dog's Tale has 55 pages.
A Dog of Flanders has 293 pages.
The Terracotta Dog has 352 pages.
The Lost Dog has 345 pages.
I Want a Dog has 24 pages.
170 pages.
Scuppers The Sailor Dog has 24 pages.
Dog Years - novel - has 570 pages.
A Dog on Barkham Street has 184 pages.
My Life in Dog Years has 144 pages.
Red Dog - novel - has 119 pages.
Lessons from a Sheep Dog has 75 pages.