Comparison of the time of the different visits (V1 to VF) between the two sessions.
The time of a visit is expressed in hours and corresponded to the elapsed time between the beginning of the test and the given visit.
Cats (n = 17) had a free access to the food by using a feeding station.
Black bars: VPK session; empty bars: LPK session. A session lasted for two days (D1 and D2).