Never say never: If the job ad said "we may allow you to occasionally work from home" OF COURSE you can ask "how often". If you already have a vacation booked in 6 weeks time that cost more than you're going to earn in the next 6 weeks OF COURSE you should ask how quickly you accrue vacation time, and as a prospective employer I want to know that before I make you ANY sort of offer.

And if you walk in to an office for and interview and see cats, dogs and guneas pigs under every desk of course you can ask "CAN i BRING MY DOG TO WORK ...TOO". I allow my staff to bring dogs (and small kids) to work provided they are friendly and well behaved and socialised... I'd sooner they ask the question up front that just assume and us have a problem day1.

I think Vitamin T are slightly up their own.... to slap the NEVER word in front of these