No any animal can breed at any age of its life
No, that is a good age to breed dogs.
No I have a really old dog who just did.
Yes. Do not breed females after 7yrs for most breeds except English bulldogs, which should be retired by 6yrs.Males, if sound, can breed till 8 or 9yrs.
No, as long as the dog is healthy it is not too old.
Not sure if serious or just very stupid wqell i meant to say puppy, of course nota human
She may not be too old to be pregnant, but it is not safe to breed a 23 year old arabian. The foal and the mare may die during the pregnancy. If you are planning to do this, I want you to take my advice and do not try to do this if you want her to live much longer.
A male can breed all his life and a female can if she till has cycles but I don't suggest it.
This is much too generic to be able to answer, because it all depends on the breed, genetics, body condition, etc. of that cow.
No. Female hamsters lose their fertility within one year. If the hamster is male, then it is possible that he is too old as well - I tried mating a younger female with a 1 and a half year old male and it didn't work.
around once it gets to 75% of it's expected age.
Just like with cows, a bull is culled based on conformation, temperament, fertility, health issues and breeding ability. A bull can be too old to breed when he's 5 yrs old or at least 15 years of age.
No.