Increased vocalizing, especially loud yowling or crying
Restlessness or pacing
Affectionate behavior, such as rubbing against people or objects
Rolling on the floor
Raising the hindquarters and moving the tail to one side
Frequent attempts to escape outdoors
Increased grooming of the genital area
Reduced appetite
Marking territory with urine
Seeking attention more than usual
Assuming a mating posture when touched on the back or near the hindquarters