i'm not sure what you mean by it not fitting in the cart....we had a graco (not the snug ride though) and all depending on the cart, depended on how she fit in it. some places i HAD to put her in the cart (like walgreens and places w/ the extremely tiny front of the cart) but going to the regular store, like a&p some carts the seat would fit perfect, and some she would be practically STANDING (while still strapped in) but we kept her in it that way. but honestly, if you have the option, and CAN go shopping without her, then do that, it would be much easier. although, when i didn't feel like taking in a cart, and wasn't doing too much shopping, i would go with the stroller, and just shove the groceries in the bottom of the stroller (we had a decent size bottom) and no one would even question us putting stuff down there, i've also noticed many other moms doing that....so those are the options...like i said, IF you have the option, just keep her home until she can sit up on her own and just put that cover in the seat and let her go in there. oh, i started doing that by 5/6 months, and a friend of mine used to just put that cover (the real fluffy one) in the front seat of the cart, and lay her kid down. hope one of these options are of some help to you.