Start getting your Golden Retriever used to being brushed and examined from a young age. Frequently touch his paws – dogs are sensitive to paws – and check his mouth.
#1 Also check these every time your dog gets wet.
When checking your dog's ears, wipe them with a cotton ball dipped in a gentle, PH-neutral ear cleaner to prevent infection. Do not insert anything into the ear canal; only clean the outer ear.