If the dog is marking for sexual reasons, then it is possible that castration will stop him doing this. Unfortunately, many dogs initially mark for sexual (/territorial) reasons, but after a while the behaviour becomes learnt. Castration will stop innappropriate sexual behviour, but may not prevent urine marking (which may have become a learnt behaviour). Get advice from a professional behaviourist if castration doesn't help.
You can't, neutering is permanent.
1800 is correct!
Yes, the sentence is grammatically correct.
Your Dog is just telling your sons dog that it is his house and is marking his teritory
A year is the correct answer.
Yes; for about two weeks after neutering a male can still impregnate a female.
I have same problem flies by the a.c. in window. Inside the house very annoying. all year long.
Once a year is correct.
Neutering should not change his temperament at all ....but it may change a couple behaviors that many dog owners find annoying in un-neutered male dogs. Specifically it will likely stop him from "marking territory" with urine sprays and will discourage (but not eliminate) urges to roam as male dogs tend to do that in search of female dogs in heat.(But that does NOT mean your male Westie will become an "off-leash" dog .... terriers do not do well off-leash as they are far too curious and distractable as well as being very fast runners!)
1951
It is the feast of Epiphany, marking the end of Christmas.
Anonymously