From Our Dumb Animals, 1948.

From Wee Wisdom, 1933. 

Answers: 2 down is GOAT.  4 down is DEER.

From The Children's Newspaper, 1929.

From Our Dumb Animals, 1917.  Answers: SQUABble, hOWL, fERN [sea eagle].

From The Children's Newspaper, 1928.

From Broadcasting Health by Andress & Goldberger, 1933.  Answers: MILK, GROWTH, BONE

From The Children's Newspaper, 1929.

Answers: COAL, COOK, COOK

From Our Dumb Animals, 1917.  Answers: ANTeLOPe, ARMaDILLo, fERRet.

From The Children's Newspaper, 1936.

Answers:

A cat may look at a king. 

A barking dog seldom bites. 

An old fox understands a trap. 

An old ox makes a straight furrow.

"What word of ten letters can be spelt with five?  Expediency— X-P-D-N-C."  From The Children's Newspaper, 1919.

From Our Dumb Animals, 1920.  Answers: carp, mole, puma, doe, hog, coon, boars(?), cat. 

From The Children's Newspaper, 1927.

From Our Dumb Animals, 1935.  Answers: goat, camel, rabbit, kitten, buffalo, tapir, pony, ass, unicorn.

From The Children's Newspaper, 1936.  Answer: Constant dropping water wears away the stone.

From The Children's Newspaper, 1963.  Answer: Marlborough.

31 animal names.  From the Massachusetts Society for the Prevention of Cruelty to Animals' Our Dumb Animals, 1938.

From Wee Wisdom, 1924.

From The Children's Newspaper, 1926.

Answers: BEND, BAND, BARD, BARN, BURN, TURN

From The Children's Newspaper, 1928.

Answers: DARK, DART, CART, CARP, CAMP, LAMP

From The Children's Newspaper, 1955.  Answers: heron, horse, hedgehog, haster, hound, hornet, mole, mouse, magpie, midge, marten, mare.