I'm not sure I agree that they're H. kuda. The cornet is upright not back hanging, it has a small nose spine and low, double eye spine, which points me to H. reidi. Of course, its also 4:30 in the morning and I am suffering from a bout of insomnia, so I might be wrong.
How much did you pay for them? That may well be a better indicator of species these days. (sort of.)
Also, I noticed in the first picture that one of them has a blueish cast to its eye. It could be light, but it could be the start of a bacteria infection. And I see you have them in what appears to be a frag tank - if that is the case, keep careful eye on the temperature. Seahorses do better at cooler temperatures than reef temperatures.