Stop giving your kitten garlic. Garlic is toxic to cats.
Colloidal silver will take care of her respiratory infection. Start by giving her four ounces in her water bowl. She cannot overdose and it has no side effects. This works better than any antibiotic.
Utopia Silver, http://www.utopiasilver.com has a first time buyer special offer where you get one bottle free for every 8 oz bottle ordered, but you must call to receive this offer. For reorders, you can use their coupon code LR001 and receive a 15% discount.
And just a note, colloidal silver has never failed me, not for me or my pets.