A dictionary of Proverbs (Oxford Paperback Reference)

doctor see an APPLE a day keeps the doctor away.
The best DOCTORS are Dr Diet, Dr Quiet, and Dr Merryman
Cf. a 1449 LYDGATE Minor Poems (EETS) 704 Thre lechees [doctors] consarue a mannys myht, First a glad hert.. Temperat diet.. And best of all, for no thyng take no thouht. Cf. LAUGHTER is the best medicine.

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  1558 W. BULLEIN Government of Health 50V I should not staye my selfe vpon the opinion of any one phisicion, but rather vpon three. .. The first was called doctor diet, the seconde doctor quiet, the thirde doctor mery man. 1738 SWIFT Polite Conversation ii. 154 The best Doctors in the World, are Doctor Dyet, Doctor Quiet, and Doctor Merryman. 1909 Spectator 30 Jan. 175 A proverb prescribes for sickness Dr. Diet, Dr. Quiet, and Dr. Merryman. The merry heart goes all the way in all but the worst sicknesses. "doctors; health
  

doer see EVIL doers are evil dreaders.
does see he who CAN, does; it’s DOGGED as does it; EASY does it; HANDSOME is as handsome does; PRETTY is as pretty does.
Feed a DOG for three days and he will remember your kindness for three years; feed a cat for three years and she will forget your kindness in three days
Japanese proverb. The variant Keep a dog.. is also found.

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  1892 L. HEARN ‘In a Japanese Garden’ in Atlantic Monthly July 26 Cats are ungrateful. ‘Feed a dog for three days,’ says a Japanese proverb, ‘and he will remember your kindness for three years; feed a cat for three years, and she will forget your kindness in three days.’ 1921 C. VAN VECHTEN Tiger in the House 137 A Japanese proverb has it that A dog will remember a three days’ kindness three years while a cat will forget a three years’ kindness in three days. This may be regarded as a compliment to the intelligence of the cat. 2007 ‘Sagara Likes Kaname?’ posting on www.forums.animesuki.com 31 Jan. Maybe familiarity breeds attraction, in this case. What is the Japanese saying? Feed a dog for three days and it becomes attached to you? (shrug). "animals; gratitude and ingratitude