I was a bit hesitant in giving antibiotics to my oldest when he had the ear infection because I know from my own experience how antibiotics can affect the body and possibly lead to other problems which, of course, would entail another visit to the vet and more medication to counteract the first one.
What had concerned me most is during the time he was taking the medication he didn't have the same spunk. He also didn't eat very much and seemed to sleep a lot. I also did some reading and, not unlike humans, I discovered that yogurt will help bring back the "good" bacteria that the antibiotics kill (along with the "bad" bacteria). So, after Bruiser was finally done taking the antibiotics, I'd give him a little bit of my yogurt when I had it in the morning. From the bottom of the cup, I'd dig out a bit on my spoon and hand it to him and he'd lick it off. Rocki, of course, was there as well. Can't give to one without giving to the other! Rocki didn't care for it, and neither did Bruiser, but it's almost as if he sensed he should have some and tried to eat it. He'd have the equivalent of about half a teaspoon in total. But this I hoped was enough to start building up the good bacteria again.
So, a few days later, it appears he's back to normal. He's not scratching at his ear and his brother's not trying to lick it for him. I'm still trying to give him a bit of yogurt in the morning, but since he's got that little "skip" to his step back, I think I can safely say that he's back to normal.