Dried fruits are really high in sugar and you shouldn't give them as treats every day. One per rabbit 2 or 3 times a week is more like what you should give them as far as raisins go.
Feeling a rabbits spine doesn't work like it does for cats and dogs. Even a highly obese rabbit will still have feelable ribs. When Lolli is up running around, look at her from the side. You should be able to see a bit of a tuck up in the belly area. If you can't, she's most likely fat.
MOST house rabbits are obese. Pellets were originally designed to fatten up rabbits for butchering and the recepie hasn't changed much since then. While there are some that are healthier than others, they're still highly concentrated food and will fatten your rabbit up nicely if used as the main part of their meal.
Cut WAY back on the treats or switch to something like half (or even quarter) of a grape instead of raisins. Make sure you're not over feeding them on pellets. It's something like 1/4 cup of pellets per 5 pounds of rabbit per day. If they've got access to plenty of fresh hay and water all day long then they really don't need any more than that. Most veggies aren't a problem but some have high sugars and shoul be given sparingly, such as carrots. Fruits should only be given in tiny portions 2 or 3 times a week.
If you think your rabbit is over weight, she likely is. Putting them both on a diet won't hurt them any even if they're not.
Turdle