Animals don't always correctly follow you when holding wheat/seeds/carrots.

What I expected to happen was...:
Animals follow me when I hold food in front of their noses

What actually happened was...:
Some of the animals follow the food fine, but after a while more and more animals become uninterested and stop following the food.

Steps to Reproduce:
1. Get some animals
2. Hold food (wheat for cows/sheep, carrots for pigs, seeds for chickens) in your hand near the animals
3. Some animals will follow you
4. After a while animals will lose interest