animals hardly spawning and losing interest in bait food

so on every created server animals hardly spawn in even when staying in the same chunk for hours! when animal is found, they at first follow their bait but then suddenly lose interest and walk away. this is very frustrating while the game is supposed to be fun and these problems have been going on for months now on the mcpe. i als9 play on the xbox 360 version and have noticed the loss of interest problem on there as well not so much the infrequent spawning