Oh my, Tux. I don't see any sign of founder there. Correct me if I'm wrong, Loosie. Please don't panic Kym. I think Tux may be out of her field of knowledge. No insult intended Tux.
Well, I suppose it depends how pedantic or literal you want to get with definitions. You could say that any deviation of the hoof wall in the least, away from P3(so flaring), or any 'sinking'(distal descent) indicates founder. It's usually termed 'low grade laminitis' or 'sub clinical' if it's not major/acute, and may not even cause lameness. When a horse is rocking back or otherwise unwilling to weight their toes that's generally pretty chronic, &/or they're currently suffering an acute 'attack' of lami. Therefore you definitely don't want to wait for those symptoms!
... So saying, I don't think it looks terrible at all & echo NM's reassurances to you Kym. I'd just not ignore signs such as I've already pointed out, learn all you can about treating & managing them & hopefully avoid it happening again in the future.