From the Knit Rowan website:
Knit this accessory beret, a design from the Rowan archive originally featured in Classic Babies. Designed by Martin Storey using Baby Merino Silk DK, a luxury machine washable yarn designed specifically for babies (merino superwash wool and tussah silk), this pull-on beret has a cute scottie dog motif.

There is a matching cardigan.

This pattern is free, but does not give instructions for the hat.