At least two years old and not until it has received a certification either in competition or by performing a recognized job applicable to it's breed, health clearances showing it to be free of hereditary issues such as hip and elbow dysplasia, inherited eye diseases like cataracts and progressive retinal atrophy, inherited cardiac issues, and thyroid-auto immune problems.
A female dog must at least 1 years old to breed.
Labrador Retriever
No, as long as the dog is healthy it is not too old.
Talk to your vet, it all depends on the breed/health of the dog.
pretty sure they do
No.
1 year
No Arabian is not an od dog
It depends on the breed. Often it would be about 245. It's very unlikely that a dog would be that old. Between 4 and 5 depending on the breed.
You need to specify what breed the dog is in order to get an accurate answer.
ALL dogs, no matter their size or breed need training!