Great pics Sharn! Those boys sure are growing like weeds. I wouldn't worry about the climbing on the back thing. Fillies do it too sometimes. I think it's just a stage that all foals go through when learning how to play. The first thing they have to play with is Mom.
Speaking of climbing on backs, the cows in the adjoining pasture are humping each other like mad. And that's the funny part, they're COWS humping other COWS, not bulls. And they're making all these really strange noises. It's like a cow orgy out there! I'm glad I was by myself or it'd be embarrassing.
They are sure growing fast! i'm 5ft 8 so it gives you some idea of the size of Adge!
We have cows in the field next to us, Lightning plays tag along the fence line with them! I love cows, my grandparents (whom I lived with as a child for half of each year), had a dairy and I would love to have some of my own one day. I intend to study about black angus and hopefully raise some. Deaconjim has a bull in a field down from us, called T-bone! He is so big and strong looking but about as much use as a fence post as he is sterile! LOL