What age is she? They'll poo loads for the first few months - on waking and after every feed (depending on her age this will be 3 or 4 times) and at various points in between, if she's anything like ours! Our pup is 8 months now, and she has great poos but still got blocked anal glands a few months back, just a freak thing. It's never reoccured though, touch wood.
Food wise, I have to admit I don't like pedigree. After lots of trial and error (one of our dogs has a very sensitive stomach)we tried Wainwrights from pets at home and we've never looked back. It's very high quality (the wet food has at least 60% real meat - in comparison some of the pedigree stuff is only 4!) and the rest is made up of all-natural ingredients - there's no fillers like corn or wheat and nothing to cause allergies. As well as being gentle on their stomachs, it's also very concentrated. This means that you can feed less. The feeding guide says our 26kg labs should be on one tray per day, which is the same amount of food that's in just one tin of pedigree (which we'd need 4 of apparently!). So instead of 4 tins of pedigree at 50p each, they get one tray of wainwrights at 72p. The wainwrights dried food is also excellent quality. Ours would be starving if we only fed them one tray per day, so they get a bowl of the dried stuff in the morning and a tray of wet food at night (we used to split it into 4 feeds for the pup). It's important not to feed them too much as a puppy, but each puppy is different so I tend to go by eye - at the moment ours are on the perfect amount IMO (contrary to the feeding guide which says it should be halved), as they're nice and slim.
If you can, try to get her exclusively onto dried food. It's easier to do this whilst they're at that 'eat everything' stage, as they'll wolf down anything. Dried food is so much better for them than wet (you'll really see a difference in her coat and it's good for her teeth). Apart from that, it's cheaper and much easier to store! You can feel guilty at first only giving them dried food, but as long as you give them some variety they're fine. Ours have currently got four flavours of dried food in the cupboard, and they get a different one each morning. We'd like to stop giving them the wet food at night, but it's too late for us now, they would NOT be happy if we cut them off after all this time, lol!
I know people will say there are lots of foods out there even better than wainwrights, but I found them to be expensive or hard to get hold of. Wainwrights isn't the cheapest, but it's not too expensive either. And everyone's got a PAH nearby so it's easy to stock up.
HTH
Ps with the nail clipping - make sure you get the scissor type clippers or just use normal human nail clippers - the guillotine ones can trap their claws and rip them. Doggy nail files are also good if you're scared of the clippers!