I have came up with a house rule for figures not neccarceraly on any side. because they are not on any side they are always moved and will attack on the turn of the first player too start.
movement : animals aggresive
roll a scatter dice. the animal will move in that direction. if it lands on a hit

it must attack the nearest unit in the asualt phase.If shot at it will make a leadership test

. if failed it will move 6 inches in the oppisite direction of the shooter in the movement phase if succeeded it will move 6 inches towards the shooter in the movement phase.
asualt: animals agressive
Animals will automaticly asualt uits it is in base contact with a member of.If in base contact with more then one unit it will automaticly asualt the unit with the least members (not including independent charecters!).
movement:animals timid/citizens
they will always move in the opposite direction of the nearest unit that is in 36 inches. If there are none within 36 inches they will move in the direction of the nearest terrain they can get under (eg stories of ruins, inside buildings; underneath terrain on stilts,ect,ect.) or to the nearest table edge.
asualt: animals timid/citizens
they will not asualt unless asualted. therefore if they are asualted by a unit, the nearest possible turn they would asualt back.
cover: animals and citizens always provide and take cover as usual.