I think the same rule applies to reptiles - if you skip a dose you could possibly run the dual risk of (1) not completely killing the infection or (2) knocking the infection back, and in the process facilitating it's resistant to Baytril.
The only antibiotic I've ever seen administered every 24 hours is Baytril. I've never had to administer other antibiotics every day - the most frequent dosage I've ever seen prescribed for snakes outside of Baytril is every other day. Ceftazidime, for example is every 72 hours.