s gone bacterial you need to add an antibiotic as you have, using the both together will a huge benefit
for the
kittens and momma too, can't believe your Vet didn't suggest this. You can buy some thru your Vet clinic to get started with but meanwhile order it thru iherb.com where it's cheaper and more pure. Or if you have a good vitamin supply store hand where you can get one in powder form with no soy,yeast,corn, salt etc, so it's safe for cats.