Good news, Lizzie has arrived in Colorado and is acting like she’s lived here her whole life! I ended up giving her just Ulcergard and crossing my fingers, and she’s fortunately taken the entire trip in stride. Drivers said she drank plenty of water the entire time and she’s been 100% normal here so far (we’re on day 2 of life in Colorado). Thank you everyone for your tips and support!! Also, I can’t recommend Equine Express highly enough, they were absolutely fantastic.