Red eye tree frog discoloration

[Tony]

As Cheri said, those spots are often a sign of systemic bacterial infection and need to be treated very quickly. Move him to a dry quarantine tank, a simple and easily sanitized setup using paper towel as the substrate, a water dish and a plant to hide in. Do not mist, the water dish should be the only source of moisture. Baytril is the best antibiotic to use but is available only by prescription from a vet. If you are not able to get it today pick up some Furan-2 at your local fish store. Mix it up at about 1/3 of a packet to a gallon of water and soak the frog in it for 10 minutes twice per day. I have had excellent results in the past using Furan until I was able to get Baytril.