Can a conservator deny a visitation for a child being sick when a court order for stanard visitation is in effect

Each parent is supposed to "protect" their child, so it could be arguable this was in the child's best interest.  However, it is not automatic and can be argued the other way - i.e. that the other conservator was just as able to care for the child.  Question really is - should we move a kid back and forth who's sick in bed (assuming that is the fact scenario)?  It would probably be best to request some make-up time due to the issue.  Feel free to call with any further questions.  Andrew Lloyd 940.381.2600