Love me, love my dog.

John Heywood (1497?-1580?) English playwright and epigrammist

Proverbes, Part 2, ch. 9 (1546)
    (Source)

Earlier noted as a common proverb by Bernard of Clairvaux in the 11th Century: "Qui me amat, amet et canem meum [Who loves me will love my dog also] in his First Sermon on the Feast of St Michael.