Prostate cancer usually displays several symptoms in the early stages of development.

Explanation:

False

Prostate cancer does not usually display symptoms within its early stages of development- in early stages it's deemed as asymptomatic. This type of cancer grows very slowly and is usually limited to the region of the prostate gland=and some cancer types require no or minimal treatment while others grow and spread aggressively.

In later stages prostate cancer symptoms include bone pain, erectile dysfunction, pelvic discomfort, trouble with urination and blood found in the semen. men are at higher risk for prostate cancer development as they age,  if they have a family history of prostate cancer or if they are obese.

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i think he will be okay, id probably take the dog to the vet just incase