I made a spreadsheet to generate chimeras.

Some example results:

• Horse head on a reptilian body, with horse legs and the tail of a dragon. It is winged and albino.
• The head of a bear on the body of a dragon, with equine legs and the tail of a bear. It has six legs and four tails.
• Avian head with the body and limbs of a bear, and a reptilian tail. It has wings on its back and near each of its feet, and four eyes.
• A feline head on a canine body, with feline legs and a bear tail. It has six eyes and is made of plants.
  

I made it so that it's a bit vague and gives you a bit of room to imagine a wider range of looks for these horrible monsters. Feel free to try it out and share your results!

Two bear heads with three horns, bird body, cat legs, dog tail.

Yesss, I love this! That's so good!