trees full

while visiting a friend Kitty and i noticed that all her trees were fulled with fruits in fact we have being seeing it for quite a long time and were wondering although the trees looked really nice fulled with fruits does it stop more fruits from growing? Kitty and i are really not sure if the trees will bare more fruits until at least one of the fruits were plucked. But some time while roaming around pet's houses in the cafe, i have noticed that there are dome times fruits on the ground like it had fallen down and even sometimes kitty her self heard a noise while sitting the garden. the noise is like something had fallen but we cant be sure unless we have see it which we did not :(
so if any knows the answer plezz write it in comments :)