Of uncertain origin. One (unsubstantiated) conjecture is that the word comes from Putzi, a common German name given to lapdogs. The name Putzi is possibly formed from German Putz + -i, influenced by German putzig (“funny, cute, small”, adjective).
Ćwicz mówienie i zapamiętywanie " pooch " i wielu innych słów i zdań z angielski .