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Hello, I'm Dr Gary. I've been practicing veterinary medicine since 2007. I look forward to helping with your questions/ concerns.
I would also suspect blood clots from the urine.
In an intact male, BPH (benign prastatic hypertrophy) and prostatitis are actually more common than prostate cancer. Cancers are more common in neutered males.
The best thing to do is to get an exam with a good rectal to palpate the prostate. I would also recommend ultrasounding the bladder and prostate. A urinalysis would also help to determine if there is blood in the urine.
Sorry, I was working on the response.
The treatment depends on what is found. Often times the first step is neutering to see if that shrinks down the prostate. If it does, that may be all that is needed. If it's still enlarged, then we consider a biopsy to look for prostatic tumors and culture the tissue to rule out prostatitis.
Oh yeah, blood clots can easily be this large. It could occur with stones, urinary tract infections, bladder tumors, prostatitis or prostate tumors. These can all cause bleeding into the lumen of the urinary tract and lead to blood clots.
I don't know if I would just jump to antibiotics. I would probably try to rule out some other things first. Especially in a dog this old. I think it's more likely one of the other things as opposed to just a run of the mill UTI.
If the prostate is enlarged and part of the problem, then yes I would neuter him. Even at 15, I would neuter him. This is such a short and routine procedure, I would have no worries about the anesthesia. I would of course check pre-anesthetic bloodwork to be sure the kidneys and liver are functioning properly.
When it comes to antibiotics, I want to know if it's urinary tract or prostate. If bladder, I go with Clavamox (Augmentin). When I'm trying to get to the prostate, I need something that crosses the blood-prostate barrier. That's usually a Fluoroquinolone or Clindamycin or in rare cases Sulfa/ Trim.
That's the corgi, they have short fuses.
I think it's probably the prostate, but stones and bladder tumors would be on my differential list as well.
I usually go 11 mg/kg BID. In a 25 lb dog, I would give 125 mg twice daily.
For a prostate, I usually go 10-14. 7 minimum.
No problem. Happy to help.