They may be despawning from your world. This happens in all editions of minecraft. There is no way to guess when an animal despawns, but they do this most likely so the world isn't crammed with mobs, or to stop lag from occuring.
no
The animals are supposed to disappear when you leave the game Minecraft. After every 64 blocks that is made an animal disappears making more room to build.
use wheat in your hand
no only on the computer works
yes by putting them together in an enclosed space and waiting
Yes. It is possible to crouch in the minecraft pe.
there are no mods in minecraft pe i hope there will be
There are no mods for Minecraft PE But it would be cool
If you have already purchased Minecraft PE, then update the game.
Minecraft PE 0.8.0 does not have squids in it.
there is no jungle biome in minecraft PE
there are no rumors for minecraft pe version 4.1