3D animated cows for website

We need some additional animated cows for our website. It will need to have a transparent background and transparent gif format and must be very similar to what we have. I have attached current cows for examples and guidelines of what we expect (dimensions should be approx the same). Here are the animated cows needed : 1. Cow walking with shopping trolley (for purchase page) 2. Cow shaking hand with another cow (for partnership page) 3. Cow reading newspaper 4. Cow on telephone 5. Cow writing on paper pad standing or sitting We will let your imagination do the work :) Examples of our 3D animation must be submitted and if possible a still mockup of one of the 5 cows above. Thank you and good luck