Is it ok to sire at 15 months (Mini Schnauzer)?

[AnnieHooo]

We have been approached by a family in our local area (everyone knows everyone) as their mini schnauzer is in heat and they know we have a 15 month old mini. We had never considered him being a sire.
Is he too young? Will it affect his relationship with our older mini dog (ie get aggressive, start peeing everywhere?)

I think it would make the family extremely happy if it worked, it's a one-off. She is 4 I believe and we live in an area where there are very little opportunities for breeding because of our geography and even more due to lockdown.

I'm stuck between 1. Just go for it he'll probably be useless anyway and 2. He's my fur baby and I don't want him to change!

I think that whether your dogs temperament changes is as much down to the individual dog himself and unfortunately you won't know until after the event itself.

What are the family planning to do with the pups afterwards? Has their dog ever had a litter before? I'd be pretty concerned about that tbh, and ensuring they go to good homes, carry out appropriate due diligence etc.

Generally, the dogs I've known who have been stud dogs have been fine apart from when there's a bitch in heat and other males nearby

Has he had all the relevant health tests for the breed? Has the bitch?
Are both dogs KC registered?
Can the bitches' owners afford to pay all the vet fees associated with pregnancy, birth and raising new puppies? What happens if she gets sick or dies in labour? Insurance won't cover pregnancy complications.
What happens if one of the puppies gets sick? Can you afford to pay for appropriate vet care?
Do the bitches' owners have homes lined up?
Can they afford to take 8-9 weeks off work to look after newborn puppies and to ensure they have excellent care?
What happens if the new owners change their minds, can either of you provide lifetime care for the puppies?
Dogs who are used as sires can change temperament - do you want to risk that in your family pet?

In other words - you are not a professional so don't breed your dog.

Yes, healthy and checked and KC registered and we have shared pedigree.
Yes they can afford it.
Risk to family pet - unsure.

Can the bitches' owners afford to pay all the vet fees associated with pregnancy, birth and raising new puppies? What happens if she gets sick or dies in labour? Insurance won't cover pregnancy complications.
What happens if one of the puppies gets sick? Can you afford to pay for appropriate vet care?
Do the bitches' owners have homes lined up?
Can they afford to take 8-9 weeks off work to look after newborn puppies and to ensure they have excellent care?
What happens if the new owners change their minds, can either of you provide lifetime care for the puppies?
Dogs who are used as sires can change temperament - do you want to risk that in your family pet?

In other words - you are not a professional so don't breed your dog.

Struggling to see why you'd even consider this. You say they've been checked but have they both been health-tested as pp asked? Why would you have health-tested a dog you haven't previously considered breeding? What's the inbreeding coefficient of breeding these two dogs? What is the motivation for the bitch's owners to breed? Has she had litters before? Why have they waited until she's in heat to approach you? Etc

Yes I've decided against it.

Great idea just what the world needs more bloody puppies when the rescues are already full