The mother is standing over the calves, licking them after they are born. Seconds later the calves are completely dry and the mother is laying down away from them.
While Arno "plays human", the actor's bare arms are revealed when his sleeves slide up while chasing chickens.
In several episodes, apes are often referred to as "men"; especially, the apes under Urko's authority are called "Urko's Men" not Urko's Apes. Virdon says it 3 times and Burke, once. In other episodes, even apes make that same mistake (The Liberator).