UPDATE He is doing much better now he did end up in the ER and he just got tubes put in his ears d/t fluid behind the right ear. Thanks so much for your advice!
Hello and hope you are doing well.
If his symptoms are worsening with the antibiotic then the infecting organism may not be susceptible to the antibiotic. Have a culture and sensitivity test done to find out the correct antibiotic that the infecting organism is sensitive to and taking this medication for the required amount of days may help to clear the infection. Also, repeated throat infections can affect the Eustachian tubes, which connect the middle ears to the throat and can cause ear infections. So, take precautions and treat the throat infections at the earliest. For now, continue with the medications and as the infection resolves, his appetite should improve.
Hope this helped and do keep us posted.