OLD YELLER (158 pp.)Fred Gipson Harper ($2.75).
All books about faithful dogs have one thing in common: almost complete immunity from literary criticism. Who would be rash enough to examine the soft underbelly of Bob, Son of Battle or cock an ear to the corny notes in The Voice of Bugle Ann? The same armor of sentimentality will surely protect Old Yeller. Texas Author Fred Gipson, onetime newsman and veteran of the pulps, has written double insurance into his third novel. Not only is Old Yeller a mongrel of rare courage and devotion; his 14-year-old master, Travis, totes about as much man...