The font that you used did look professional but the colours seemed too bright and over the top for an animal logo. Maybe tone it down a little and make sure that the resolution of the images are clear as the links you posted did seem a little grainy on the outside of the logo. Hope this helps! 🙂

I personally like the cube logo. To me it stands out and the others honestly arnt amazing. They seem a little plain and without life. I would suggest being more open and creative, possibly ask for help on other forums to give you some ideas. But the cube logo does look professional and well done. Hope this helps! 🙂

Hopefully this helps!

You can charge for registering the customers trademark for them, but it costs around £250 for a single category registration anyways. So you'd obviously have to charge more than that if you wanted to make anything out of it. You can sell 'ownership' of the logo but most companies / freelancers in the UK will just give this away considering how busy the market is. Hope this helps 🙂