What kind of animal do I need to build Stables lvl 2? 

I'm pretty sure this goes in the Help forum rather than bugs... Anyways, where it says 'List of Requirements' down at the bottom of the crafting page, that is where you find out what your pet needs to be able to craft that building. If you don't have a pet that meets the requirements, I have a female worker throdama here( http://beastkeeper.com/pet/682310 ) that you could have for free.

 Thank you, you have been very helpfu.