Just didn't know which category to put this brooch under, hope you found it o.k.

Dog seems to have been attached to glass button

Back of glass button measures approximately 27 mm wide

Please look at back - there are two purpose made holes

An unknown metal ( nothing precious ) bar has been threaded through one of the holes

Bar has been threaded through one of the holes and little terrier dog attached

A little bit of chain has been added with brooch pin approximately 25 mm long

Metal unknown 

Paste glass jewels have been added to dog and front of fixing pin

Please look carefully at my pictures

Country of origin is unknown - just guessing United Kingdom

Date when made is unknown

Maker unknown

Couldn't find a similar brooch to compare with