[akstrohm]

First of all, I'm very sorry for your loss.

Please do the following for your current pig:
-Read all the stickies on this forum about diet, medical care, housing etc. It seems to me that you are a very caring owner who didn't know how to best take care of pigs and what signs to look for. This site will help you out a lot.
-Start feeding your new pig veggies according to the nutrition charts posted in the diet and nutrition forum. 1/8 bell pepper per day per pig will provide enough vitamin C and prevent scurvy. Pellets have some vitamin C, but it can degrade rapidly in the light/air. You can give plain vit C (no sugar) tablets (not drops) if needed.
-Get your current pig to a vet to make sure she is healthy. It is possible that she has parasites or an illness that will need treatment.
-Weigh your pig weekly. Weight loss is often the first sign of illness, and pigs can go downhill very quickly when they get sick.
-Once you've done your research on care and gotten your pig checked out by a vet, consider adopting her a friend of the same sex. Avoid pet store pigs--they are often sick, and you don't want to have to deal with another illness and loss.