My favorite Pet

My favorite per in the shop is a parrot,
It is green and yellow.
It has a long beak.
It is chirping now.
I like it very much.

My favorite Pet
My favorite per in the shop is a lizard.
It is green and ugly.
It has a long tail.
It is creeping on a branch now.
I like it very much.

My favorite Pet
My favorite per in the shop is a squirrel.
It is brown and white.
It has a very long tail.
It is playing with his nest now.
I like it very much.

(Would you check the writings? Are they all grammatical? If you find unsuitable expressions, correct them, please.)

In the second line of each set of sentences, use "pet" instead of "per." I think that was just a typo, but it still needs correcting.

In the parrot sentences, I'd use "talking" instead of "chirping."

In the squirrel sentences, I'd use "in his nest" rather than "with his nest."

Everything else is fine.

Sure! Here are some corrections to your writings:

My favorite pet in the shop is a parrot.
It is green and yellow.
It has a long beak.
It is chirping now.
I like it very much.

My favorite pet in the shop is a lizard.
It is green and ugly.
It has a long tail.
It is creeping on a branch now.
I like it very much.

My favorite pet in the shop is a squirrel.
It is brown and white.
It has a very long tail.
It is playing with its nest now.
I like it very much.

I have made a few changes. In the first sentence of each paragraph, I changed "per" to "pet" since "per" is not a common word and "pet" is the correct word to use when referring to animals that are kept for companionship. Additionally, I corrected the pronoun used to refer to the squirrel's nest by changing "his" to "its" since it is more appropriate when referring to a squirrel's nest.