Dog has a uti

My female gets it pretty often. She takes the antibiotics and they help a lot. There is also a spray, but she doesn't like that one bit.

I learned recently u can buy antibiotics for fish over the counter. Its the same exact stuff vets give u...and its much cheaper. My mastiff has been on 500mg tablets of cephalaxen i bought off of ebay for a week. Found a dosing guide online. Working great.

Frequently peeing (more than usual), darker urine and some blood in urine

I wouldn't even know I dknt ever study my dogs' piss

They act different. Act like they need to pee more, will finish pissing then squat right back down. I wouldn't say I "study" her piss, just know the dogs mannerisms and know what to look for

If you dog is having urinary issues that frequently then there is likely a reason for it. Does your vet perform a urinalysis every time. Has he ever talked to you about culturing the urine to see what type of bacteria if any is present and what antibiotics it is susceptible to. You may just have inflammation without infection, could be an infection that is resistant to the antibiotics you have tried, you may need a longer course of antibiotics. Also what kind of food are you on? Diet can often play a role in urinary tract disease. It's possible your dog could have crystals in urine or even bladder stones. Consider having an X-ray to rule out stones.