You can buy an "underwater" PVC repair kit. Providing there are not too many holes, this is the easiest way to repair, as you do not have to drain the water. However, goggles and someone pressing down on your body (or lead weights), do assist to keep you below water, whilst you affix the patch and the underwater PVC repair kit. Dries almost immediately.
There are a number of products you can use to prolong the life of your pool. You could install a wall foam between your pool wall and the liner to keep a smooth surface next to your liner to help prevent punctures. You could purchase a liner pad or pool padding for the bottom of your pool. And you can invest in vinyl liner repair kits to repair the small punctures and prolong the life of your liner.
You can get the pool product you need at http://www.cheappoolproducts.com.
If the pool is drained by mistake and the liner has floated, make sure to keep the liner wet. This will prevent it from possible shrinkage.
Pool liner repair tape that can be found at most pool supply stores.
I suggest searching for the answer on eHow.com.
Do a goggle search find above ground pool repair k
Remove the old damaged liner and install a new one.
You'll have to pump the pool down far enough to get the liner lip back into the groove. If you need someone to do it check out pool businesses in the phone book.
Yes buy using a wet under water repair kit
If he accidentally fell in and tore it, it's not his fault but the dog's owner can be held responsible to repair the damaged liner.
Yes, that's one of it's many uses.
There are many places where one can buy a pool liner. One can buy a pool liner at popular on the web sources such as Liner World, USA Pool Pros, and National Pool Wholesalers.