Webbed toe on new chick
She could be experiencing some shipping stress if they just arrived today.
Provide the chicks with some vitamins/electrolytes in their water - something like Poultry Nutri-Drench or Sav-A-Chick.
Also provide them with their chick starter.
As far as the web toes are concerned, some people take them to a vet to have the webbing clipped or they do it themselves.
I agree, wait until she is stronger.
Make sure she is hydrated well.
If she is having a bit of trouble eating, you can try wet chick starter (all chicks seem to love it). You can mix the chick food with the vitamin water if you wish.
An eye dropper or syringe works well with getting water into them too, you just have to be patient, but if she will drink from a spoon that is great.