Degrees of comparisons of adjectives

I think cats are ...(good) pets to have.

Canaries are ...(colourful) than ostriches.

Dogs are ... to keep than parrots..

It is _____(bad) dog I have ever had.

Wales are .....(big) mammals in the world.

Polar bears are one of ...animals on the planet.

Pets usually live in ....flats or houses with their masters.

Parrots are ... pets I ever see.

She is _____(kind) person I have ever met.She takes care of animals.

This is ___(bad) dog's shelter we ever visited,animals are hungry there.

Elephans are ...(big) than crocodiles.

The giraffe is ... animals in the world.