Do I need to lodge a tax return as a Pet Sitter even if I earn below the tax free threshold?

Do I need to lodge a tax return even if I earn below the tax free threshold?

Yes. If you have an ABN and you earn even $1.00 of business income, you have to lodge a tax return.
Here's a short video on what the ATO says about the Tax Free Threshold and whether you have to lodge a tax return.