POWERdestroyer

Put smooth input and smooth fps on the performance settings and download gamebooster it closes all programs in the background while you are playing minecraft

It's not my server and it has got quite a lot of lag but... IP: hsm.neonshift.com

Once I started my world I saw some pigs and now I haven't seen any passive mobs since not one? Please reply if you know why this is?

I think you have to go into options on the hack slash mine in the launcher and change it to development build that should do the trick