Is it safe for a black lab to have ice cubes?

lots of people disagree on this matter there is allot of horror stories about dogs getting muscle spasms and being rushed to the vet ,chilling the dog stomach and giving them hypothermia myself asked the same question i decided not to give my dog ice cubes as i thought it wasn't worth the risk because there is so many horrible stories vets say it is ok and some say it is not ok.It is hard to decide which vets are right so i just didn't take the risk of my dog getting muscle spasms or anything else horrible have heard people say that they give their dog ice cubes all the time when their to hot and their dogs fine but then some people say they have had to rush their dog to the emergency vet because if giving their dog ice cubes.