I am new here today and am a keen amateur gardener (still learning). I have just spent alot of money re-landscaping my garden. The back lawn is still growing great and is very lush. However, the front has been subject to dog urine (I have about 6 patches and could cry!). I am getting the front walled in, but I need to know if I would need to just replace the damaged patches, or is there anything I can do to promote growth again? Any advice you can give me would be very appreciated.

Also, I notice in my back lawn I have some very small mushrooms coming through. Is this something I should worry about or do I just mow them up when I cut the grass.

I look forward to your replies.