Minecraft – Can you tame an ocelot but have it keep its original texture

They have a collar because it's the same entity as a tamed dog but it can't be edited in any way as you would with a tamed dog (using dye)

The only difference between tamed and untamed dogs in the code is that tamed dogs can have their collar painted and that they can sit down and teleport to the player.

The untamed tog just has an undefined color variable as it's collar color that displays the same color as the rest of the dog. Therfor it looks like it's not there

There should be some downloadable aps that allow you to add textures in the Minecraft PE. Some sites will allow you to download texture packs: http://mcpeuniverse.com/texture-packs/ There are few videos out there showing how to do this, but here is a link to a video for all I-Devices

If you are running on android this video will show you how:

If you are running a JTAG x-box this video will help you:

A little work will be involved to do exactly what you need, but this should get you what you need for these devices.