This is the pattern for crocheted Chihuahua, size is 19 cm from nose to tail and 17 cm height.
The pattern is in Englsh, consists of 11 pages and has a lot of helpful photos. I would like to note that you are experienced in crocheting and know the basics. You have to know how to make magic circle, increasing, decreasing, working in rounds and rows etc.

Required Materials:

 Yarn – white (I used one full skein and a little bit more of the second skein – Gazzal Baby Cotton 50g -165 m) You can use the yarn which you would like to, but from thickness of the yarn depends the size of a toy. Also you will need a small quantity of light pink or beige yarn (for the inner part of ears); some black, light brown and dark brown yarn (also a small amount)
 Hook - I used 1,50mm (yarn manufacturer proposes 2,00 mm). If needed you can choose another size of your hook to fit it to your yarn. Always take smaller hook then Yarn manufacturers propose. There should not be gaps in your work.
 A tapestry needle to sew the crochet parts together.
 Filling. I used a fiber fill, which I bought in the yarn shop.
 Pins