Ancient Romans and Greeks would write things about their dogs and have custom grave stones made, one of my favorites reads:
"My eyes were wet with tears, our little dog, when I bore thee (to the grave)... So, Patricus, never again shall thou give me a thousand kisses. Never canst thou be contentedly in my lap. In sadness have I buried thee, and thou deservist. In a resting place of marble, I have put thee for all time by the side of my shade. In thy qualities, sagacious thou wert like a human being. Ah, me! What a loved companion have we lost!"
"My eyes were wet with tears, our little dog, when I bore thee (to the grave)... So, Patricus, never again shall thou give me a thousand kisses. Never canst thou be contentedly in my lap. In sadness have I buried thee, and thou deservist. In a resting place of marble, I have put thee for all time by the side of my shade. In thy qualities, sagacious thou wert like a human being. Ah, me! What a loved companion have we lost!"