Canvas Expansion & Rock Integration

I need a quick photo edit where the canvas size is increased at the bottom and additional rocks are photoshopped into the image.

Ideal Skills:
- Proficient in Photoshop
- Experience with canvas size adjustments
- Skilled in realistic object integration

Requirements:
- Enhance the canvas size of the image.
- Seamlessly integrate additional rocks into the bottom of the image, matching the style of the existing rocks.

Please note, the rocks to be added should be identical in appearance to the existing ones at the bottom of the image.