Pig's are not attracted to wheat and when wheat is used on them, nothing happens (the wheat is not lost either). Sheep and cows still respond normally.

What I expected to happen was...:
I thought pigs would follow me when I held wheat, and go into 'love mode' when I used the wheat on them.

What actually happened was...:
Pigs were totally unresponsive to wheat - they did not follow the holder or go into 'love mode' when the wheat was used on them.

Steps to Reproduce:
1. Hold any amount of wheat.
2. Approach a pig(s).
3. Use the wheat on the pig(s).