我的猫

我有俩猫。我爱我的猫。:)

一只猫叫Hoshi。Hoshi是只乖巧的猫，她是一只老年猫，她有十二岁。
另一猫叫Sassy。Sassy有六岁。

This is what i am trying to say in English, thank for you for any correction:
"I have two cats, i love my cats. :)
One cat is named Hoshi. Hoshi is a good cat, she is an elderly cat, she is 12 years old.
The other cat is named Sassy. Sassy is 6 years old."

Sassy是六岁

from the grammartical perspective in english , it is right ,

but normally in chinese we say "Sassy六岁了" or "Sassy是一只六岁的猫"

她是老年猫

it is a little bit weird. we call it 老猫 if a cat is young ， we call it 小猫

so you could say 她是一只十二岁的老猫，非常乖巧（submissive）

by the way , your cats are so cute. i guess one of them is a little bit overweight.

i think she is Hoshi.

我的猫

我有俩猫。我爱我的猫。:)

一个猫叫Hoshi。Hoshi是好猫，她是老年猫，她是一十二岁。
另一猫叫Sassy。Sassy是六岁。

This is what i am trying to say in English, thank for you for any correction:
"I have two cats, i love my cats. :)
One cat is named Hoshi. Hoshi is a good cat, she is an elderly cat, she is 12 years old.
The other cat is named Sassy. Sassy is 6 years old."

我的猫

我有两只猫（/我有俩猫），我爱我的猫。

一只猫叫Hoshi，Hoshi是只听话的老年猫，她十二岁了。

另一只猫叫Sassy，Sassy她有六岁了。

我的猫

我有俩猫。我爱我的猫。:)

一个只猫叫Hoshi。Hoshi是只好猫，她是只老年猫，她是一十二岁。
另一只猫叫Sassy。Sassy是六岁。

This is what i am trying to say in English, thank for you for any correction:
"I have two cats, i love my cats. :)
One cat is named Hoshi. Hoshi is a good cat, she is an elderly cat, she is 12 years old.
The other cat is named Sassy. Sassy is 6 years old."

Great ! You make a big progress !  : )

我的猫

我有俩猫。我爱我的猫。:)

一个猫叫Hoshi。Hoshi是好猫，她是老年猫，她是一十二岁。
另一猫叫Sassy。Sassy是六岁。

This is what i am trying to say in English, thank for you for any correction:
"I have two cats, i love my cats. :)
One cat is named Hoshi. Hoshi is a good cat, she is an elderly cat, she is 12 years old.
The other cat is named Sassy. Sassy is 6 years old."

我有兩隻貓.我愛我的貓兒. 一名星星 [from Japanese], 是隻好貓, 不過老了, 是十二歲了.第二隻叫"野蠻", 只是六歲.