(Part 2/2 - imgflip wouldn't let me fit it all into one comment)
There are many different forms of these creatures - they can be mixed with any kind of feline and any kind of chicken. However, big cats (Lions, tigers, leopards, panthers etc. [Excluding servals, lynx, ocelots and other smaller "big" cats]) are very rare and are considered a completely separate form based upon the differences the change causes. For example, when mixed with a big cat these creatures are naturally noticeably bigger, with stronger muscles and bones. They also tend to have bigger horns that can slightly exceed their ears. Their tails are especially longer and often stronger.
[The pictured form is the most common/default example of the species and is not of the big cat variant]
These creatures often have saturated colors and some iridescent feathers - regardless of gender. Usually they feature browns, blacks, whites, oranges and some blues, however they can have any colors. They also often have striped or spotted markings on their fur, and usually no markings on their feathers.
They also have very good senses. Their eyesight is great, and they can usually see fine from mild distances. They hear almost everything around them, however because of this they usually prefer quieter environments and naturally get very anxious when things get a bit too loud. These creatures also have incredible noses which can allow them to smell large masses of particular ingredients in a dish, just for example.
I doubt anyone is actually going to read all of this, but gj if you did.