How to permanently identify cattle from an image?

Question

Image processing

Hello!
Moved to a farm. Until I stopped here.
Usually farmers recalculate on their own once a day. The first three months is hard, later they already recognize them by color and age. Indeed, each animal has its own unique color, especially ours, such a breed.
In our farm, 3G Internet is excellent, I think to put a mobile phone near the watering hole that will work as a webcam or take pictures at a certain time. Something similar gives androyd lost.
Let's say I receive such images daily, will I be able to identify the CRs by the image and check it in some system?