Write the next sentence in the following story.

How to keep pet rabbits cool 
Monitor the temperature. 
The ideal temperature for a rabbit is between 55 and 70 degrees fahrenheit. They can tolerate temperatures as high as 85 degrees fahrenheit, if absolutely necessary, but anything higher will increase the risk of heat stroke.
If you keep your rabbit outdoors, pay attention to the temperature. Summertime is the most common time of the year to be concerned.