Ivy's

Hi, guys. Please help, any input on this would be greatly appreciated. My GSD is 3 1/2 months old and weighed 24 lbs at her last vet's visit, a couple weeks ago. I've been treating her for a bladder infection with 2 TBS apple cider vinegar & 1 TBS plain yogurt mixed with her food 2 x's a day. I've done this for two days now. But I'm not sure if this is the proper 'dosage' for her size/age and she seems to be a little worse today. (ie; peeing more frequently, having more accidents in the house and whining). I thought I was on the right track but now I'm not so sure....I understand that antibiotics are really bad for for dogs and can cause a whole host of other problems for them so I was trying to spare her. Should I be doing something (anything) differently? Thank you in advance.