When do a puppy's testicles fully drop?

my 8 month old puppy 's testicles has not fully drop yet. As of today only one testicles has drop, but the second doesn't seem to appear at all. Should I take him too his vet right away? Or should I wait until he turns 1 years old?
thank you for your help / answer.

Take the dog to the vet. A responsible pet owner would have the dog neutered by 6 mos. Perhaps you were waiting because his testicle has not descended. Perhaps he only has one testicle or there's a problem with the testicle. In any event, I wouldn't ask amateurs this question...you need to take the dog to a vet immediately and get this problem solved.

we have a german sheperd pup, an he only has 1 testicle 2, we took him 2 the vets and he set soon as hes old enough 2 get neuterd book him in staright away because it could cause cancer so take him 2 the vets x

I never thought to look for that to be honest...hmmm...ok

sophie's experience is a common one. Many male pups have only one testicle drop, so neutering is more invasive than a 'normal' one. She's also correct about the high incidence of cancer if that testicle is left in place...If this were my dog, I'd get him neutered as soon as possible...the longer you wait, the more testosterone is being produced, and the more chance you're taking on his future health.

phrannie

they fully develop at age one or earlier but if by that time you dont see it you will have to get him neuter and they wll also have to remove the testicle thats still inside while hes getting neuter to reduce the chance of an infection.

hope I helped!!

thank you every one! I will take him to his vet tomorrow, if they are not close for holiday. And yes, I have been waiting for him to fully develope. But I guess 8 mnths is long enough. I will update his health on here. have a good holiday weekend!