How to Use Healing Brush

[Film Photog 0]

I have a photo of my daughters now deceased dog.  In the picture one of the dog's front legs has been shaved bare.  My daughter asked me for a print of the photo with hair on the bad leg.  I assumed that "healing brush" from the side bar would be the thing to use.  I clicked on healing brush and a box in the upper right said to depress Cntrl Alt which I did.  The circle on the screen changed from round to cross hair with no further instruction.  I went to HELP, typed in healing brush and nothing was found.  I found nothing in tutorials about the healing brush.  Is this a working feature of just an icon to fill in empty space?  I'm a beginner but I'm beginning to think I bought a less than great piece of software.  Maybe the healing brush function wasn't the right choice?  Any help is appreciated.

[Lee D 522]

The Clone Tool may be the better one to use, you should be able to clone hair from another area onto the shaven leg.