I was reading all this thinking what the heck lol did vet said you to do that? oh my..... poor frog

I know what you are feeding him, or i think i know, i used it for one of my frogs in critical condition. medical recovery? white can with green on a label? is it what you have? it is ok for feed frogs in emergency situations only, i highly doubt you are there yet. Feeding that food has certain risks that I hope your vet explained, aspiration is a major one, if that happens there might be nothing else can be done for a frog. When you feed you need to push the syringe very slowly and make sure a frog will swallow. it should be used as a last resort only.

as you were advised answer trouble in the enclosure questions in you next post, we can't help you and your frog without seeing the whole picture. I have very strong suspicion you need to change everything except the frog and do it asap!