As a dog owner, I will say that I use prong collars on my two large-breed dogs, a German shepherd and a pointer-mix. When the prong collars are on my dogs, they rarely pull on the lead; however, without the feel of the collar they are much more likely to be straining their necks against their soft collars.
Men older than 40 should be on the look out for signs of an enlarged prostate, specifically symptoms like difficulty controlling urination, pain while urinating, and blood in the urine. Once signs are noticed, men should be tested quickly to prevent the symptoms from getting worse.
Many of the symptoms of prostate cancer relate to the enlargement of the gland, so they are not specific to prostate cancer and can be caused by other conditions like benign prostatic hyperplasia, which enlarges the prostate gland. Very early prostate cancer may also be small and not produce any specific symptoms.