Answer: My dog, Stella, loves to go for walks in good weather but refuses to step outside if it's raining.
Explanation: If this is about grammatical issues then you need to capitalize the name of the do, put an apostrophe for the contraction of it is and a period at the end. You will also need a set of commas before and after Stella because it is the name of the dog but not very necessary information for the sentence.
