July 1950, Kiplinger's Personal Finance, Changing times[1]:
The 14-page booklet includes hints on how to catproof your back yard
2002, Jan Burke, Sweet Dreams, Irene: An Irene Kelly Novel[2], page 47:
Frank learned to catproof his place and Cody learned—after two or three times of being left by his lonesome—that if he was going to make a stink about it, he'd be left behind.
2008, Karl Pilkington, Diana Jesse, Meaning of Meow[3]:
Once you identify these danger zones, you can catproof them.
