I created a world in a previous version of Minecraft (1.5) and now in 1.7.9, because of the new UUID, my tamed wolves don't stand when I right click on them.

My tamed wolves from 1.5 don't follow me (sit, stand, etc...) anymore in 1.7.5

What I expected to happen was...:
My wolves would follow me.

What actually happened was...:
They didn't follow me.

Steps to Reproduce:
1. Create a new world in Minecraft 1.5
2. Tame wolves in Minecraft 1.5.
3. Make the wolves sit before exiting Minecraft 1.5.
4. Go to Minecraft 1.7 and attempt to stand the wolves. It doesn't work.