What does it cost for diagnosis in late hours, my Chiwahwa?

That would depend on what would be needed to diagnose the issue. I think their "emergency hours" price is $65 for a basic exam without any testing.

I am unsure what the cost would be. I would think if you call them direct they would be able to give you a much better answer.

There really isn't much difference in price. Unlike "emergency" off hours stand alone clinics. Deland ah is around the clock. So no high price gouging