Aw if he's only 7 months he should be fine
He's quite young. Baytril is the usual antibiotic prescribed for hamsters. It tastes extremely nasty and bitter so they often won't take it from the syringe. Have you been managing to get him to take it? One option is to disguise it in food, but it needs to be something quite strongly flavoured to disguise the taste, and only a tiny pea sized amount to make sure they eat it all. It also needs to be something they can't resist! Another option is to draw up the baytril in the syringe to the right dose, and then draw up a tiny bit of runny honey afterwards - then they will sometimes grab the syringe and lick it and you can gradually push the syringe so he gets the meds with the honey.
Some hamsters though just hate the syringe full stop, whatever it's got in it - that's when disguising it in food helps.
I'm hoping
@Doodleham will come on and post on your thread, because she has just been through this! And found a number of things that helped get the meds down her hamster. I seem to remember a small cube of fruit was one of them (which is ingenious). Eg something like nectarine maybe. Cut a small cube of it - very small - pea sized again. Poke a little hole in the top of the cube with a skewer or something. Inject the meds inside the cube of fruit (hope I got that right Doodleham!).
I've used beefy dog food before, but it was a particular type for small dog breeds so just like corned beef in jelly really - very fine - not big chunks. Someone else found dropping the meds onto a small piece of prawn cracker worked - the hamster ate it.
If he'll accept the syringe though, runny honey is probably easiest.
It can take almost till the last (7th) day of treatment before you start to notice any real difference.
Did the vet say what it was? It could be a pouch infection or abscess - that would affect the eye as well. Or a tooth infection. Or even an eye infection. The main thing is he has the meds to help clear it up
