On easy difficulty you get +4 combat adjustments. Dogs, with many attacks, are now relatively more powerful especially against low end troops.

I like using a war dog on very hard difficulty. Not for its destructuve effect but for its morale effect. With +7 combat adjustments in favour of the enemy the dogs are not as effective as portrayed above. Instead threy are released against a weakened unit at the height of battle. Hopefully with all the other effects going on its enough to break the enemy and start a rout.