It can be many things. If it is in the urine, it can be bladder infection, cancer, bladder stones,kidney stones, prostatitis, prostate cancer and even an enlarged prostate(the gland has many...
Male humans have a different genetic structure from females, consisting of an X and a Y chromosome, where females have two X chromosomes. The genetic difference accounts for various differences...
Then I would advise you to separte the hamsters. The wound should be o.k as long as it is not big and does not become infected. If you see any signs of infection you should take him to the vet.
It is likely that your cat has an Urinary Tract Infection. This is more common in male cats than females. It is highly advisable to take your cat to the vet so he can be treated. UTI's are incredibly...