Village Pet

I think the village should have a beloved pet or two. The pet could be written as tamed by every villager. The village pet could either be a cat, a wolf, or a llama. Perhaps to identify this is specifically the village pet dog/cat collars and llama carpet would have a special design (maybe emerald based). If a village pet it attacked or killed by the player the player will lose reputation and be attacked by the village's iron golem. The town pet will not travel further than 30 blocks outside of the villager's radius.

The village cat would wander the around the village chasing off creepers and returning before dark to try to snuggle in bed with the nearest villager. 

The village wolf would attack zombies on site and search the area for them as well as defending villagers from attacking illagers.

The village llama would be pretty much the same as the wolf.

I bit of a sadder feature but one I think that makes sense is that if the village pet dies every villager knows and holds a town meeting all day the following day at the town square in remembrance. Villager will refuse to trade for the day and instead spend the day in grief. The village will only become ready to accept a new pet after 5 -10 days.

If a village has no pet they will try to give flowers to nearby cats, wolves, or llamas. The animal will stare at the villager for a few seconds and will randomly either run away or become the new town pet.