Hey @Jdiez, the V-shape of your 1st post is curious.- you gcode didn´t has it.
It could be a travel move which crawled on the bed because of an uneven bed,-
you should activate z-hop to see if it happens again.
One point to your g-codes: Less walls at tiny prints are better, to get less holes and more infill in the object.
Try just two shells.
Your cat doesn´t need a support i guess,- the overhang angle is less than 45degree so no need to support the head.
The second post in this thread should show the cat, i guess.- The problem is you are printing very tiny things which needs some cooldown between the layers.
Have a look at this topic:
Hope this helps a bit!