Supporting KFC

So I was driving around in a mindstate of deep(ish) thoughts, and as I drove past an area where there is Taco Bell and Pizza Hut across the street from each other. I was taken back to my high school days and I remembered helping some friends move, one of which worked at KFC, so a lot of the boxes he had taken from work.

While I was moving the boxes I noticed on the sides of the KFC boxes there were the logos of KFC, Pizza Hut, and Taco Bell all next to each other. I questioned my friend about this, and he responded that they were all under the same corporation or something. I tucked that away in my thoughts, under "research later", but I tucked it away better than I knew because I never again gave it consideration until just the other night.

In the years that have passed since seeing the three business logos together, there has been a merging of KFC and Taco Bell to the point where they are together under one roof, sharing one menu.
I have done a little bit of research, unfortunately I came up empty handed thus far, and would like to know what other people think about this.
I have seen on the peta2 website where it lists what you can get from taco bell and pizza hut, but we are advised to avoid KFC altogether.
The ultimate question is 'If KFC is owned by the same corporation as Pizza Hut and Taco Bell, then by eating at both of these places aren't I essentially supporting KFC?"