My whites tree frog has been acting ill for a few weeks, he had lost weight and seemed uninterested in food. The temperature has been lower because of a sudden cold snap and i was unable to get hold of a warmer bulb and crickets for a while. I took him to the vet who told me he isnt an expert on frogs but advised me to give him Anti-biotics and to squirt liquid recovery cat food into his mouth to get food into him and see how he goes. He does seem a bit better recently so i tried feeding him crickets at the weekend which he ate a few of, although i did notice that his swallowing reflex is a bit weaker than it should be and one of the crickets sat at the back of his throat for a quite a while before he managed to swallow it. Today i found out browsing the forum that frogs with neon green spots on them might have a serious bacterial infection (although i vaguely remember seeing neon green spots on him in the past back when he was healthy). Does anyone have any advice?

Picture of frogs enclose: https://imgur.com/a/eiis9
Picture of frog in question: https://imgur.com/a/1Udjx

Frog lives with an unaffected healthy cage mate in a 45x45x60 terrarium with a day temperature of around 27C and a night temperature of around 23C