Question

I took this photo of an ox that is not mine change into plural​

Answer 1

Answer:

Explanation:

There are a few extra words in this sentence.

So it can be: We took photos of oxen that are not mine.

But if you want to include all the words that you have given then it will be :  We took these photos of oxen that are not mine.

The first one sounds better though.

Hope this helped!

Answer 2

Answer:

I took this photos of an iced is not mine