The Young Boar is a critter available through the Animal Trainer for 15 Nanopods instead of Teeth. It also does not require a Boar Pen, though this is pretty moot since the building is common.
Compared to its cousin, the Imperial Boar, it is obviously weaker. However, when compared to the similarly-priced Young Raptor, it's questionable if the Boar is better, being slightly higher tiered. Unlike the differences between the adult Battle Raptor and Imperial Boar, the differences in terms of damage between the younger Raptor and Boar are less significant, to the point where it is better to go with the Raptor for its higher rate of attack and better defensive stats.
With that said, it's still questionable if any Nanopods should be spent on either the Young Raptor or the Young Boar.