Thanks for the informationCustomer
<br /> It sounds like she does have a urinary tract infection based on the frequency that she is urinating. How long has she been on the antibiotics and what antibiotic is she on? It can take up to 36 hours to see real improvement. Were they 100% positive there were red blood cells in the urine? It is possible for the urine to look red from substances other than blood produced in the body. Has she had an increase in thirst recently?
<br /> If you don't put out the rat poison and she doesn't go outside unsupervised than this is probably not what is causing the blood in the urine however if you notice any bleeding from any other body part or any bruising on the skin, swelling or pink dots on the gums or hairless areas alert your vet immediately as these could mean trouble with her ability to clot her blood.
<br /> Another possible cause of blood in the urine is hemophilia; this seems unlikely but not unheard of. There are clotting tests that would quickly rule out hemophilia and rat poison ingestion as a cause that could be performed along with a platelet count.
<br /> The other category that comes to mind is a congenital disease of the kidney filtration system. The urine test may help your vet to determine if this is a possibility although it seems very unlikely considering how often she is trying to urinate and that she not (I'm assuming since you didn't mention it) drinking more than normal.
<br /> I don't know how long she has been on the antibiotics but the grainy stool could be due to antiobiotic administration or possibly due parasites or adjustments to a new diet.
<br /> I would ask your vet if he/she could prescribe some pain medication in addition to the antibiotics. Hopefully your vet has requested a culture and antibiotic sensitivity profile on the urine sample that is at the lab right now to be sure that the antibiotic she is on will kill the bacteria that is there. This test will also determine whether there is a true infection.
<br /> At this young of an age I would be worried about ectopic ureter disease as a cause of urinary tract infection. This is something that may need to be looked into as it will most likely become a chronic problem if it exists. The ureters are the tubes that connect the kidneys to the bladder and if they do not connect at the bladder and instead connect in the urethra, urine can collect in abnormal places in the vagina and set up dogs for infection. This condition is diagnosed with either cystoscopy (introducing a scope into the bladder) or with contrast radiography (administering a dye into the body and taking xrays to see where the urine is going.
<br />Another common problem in young female dogs (my own dog had this) is a recessed vulva. With this condition a skin fold covers the vulva or the vulva inverts into the surrounding tissue which allows urine to trap in the tissue and subsequently can lead to bladder infections. This problem is corrected with surgery. I found some pictures of normal vs abnormal vulvas in puppies (although the normal vulva in the picture is difficult to see) that may help on this site: <a href="http://www.woodhavenlabs.com/ins-outs.html
Recessed vulvas can be corrected with a "nip-tuck" surgery called a vulvoplasty which your vet could discuss with you if appropriate.
<br />I hope this information is helpful. Please let me know if I can help you further.
<br />Dr. Sarah Duncan