I’ve enjoyed trying out the ‘Rough Wash’ brush in Clip Studio Paint’s ‘Realistic Watercolour’ section but, as Barbara commented, this is looking like something that you might see on a birthday card so, good-looking as these two guys are, this frame doesn’t express a gesture. There’s nothing to prompt readers to think ‘What happens next?’
Much as I like the ponies we see on our regular walks, I need to develop their characters to tell a story. I don’t need the full cast, and, in order for them to interact, characters that are, in reality, in fields quarter of mile away from each other are going to have to be together. So sorry pinto pony, you’re going to be cut: it’s going to be the elegant chestnut and the dark brown Shetland in the grubby mac.
Here’s my rough for a more cartoony approach: