#1 - Leaving a 3.5 month old outside, unsupervised for 10 hours is NOT a good idea.
#2 - Why not leave her in the house, either in a crate or confined to one room.
#3 - if you can't do the doogy day care or a have someone come let her out a couple times a day (while she's young) you could look into setting up an indoor area for her to go potty. Some people don't like that idea but sometimes you have no choice.
My two foster pups (Chinese Crested) have a pen with a sleeping area, a play area and a potty area. When we are home they are loose and are starting to signal they need to go outside to potty.
#2 - Why not leave her in the house, either in a crate or confined to one room.
#3 - if you can't do the doogy day care or a have someone come let her out a couple times a day (while she's young) you could look into setting up an indoor area for her to go potty. Some people don't like that idea but sometimes you have no choice.
My two foster pups (Chinese Crested) have a pen with a sleeping area, a play area and a potty area. When we are home they are loose and are starting to signal they need to go outside to potty.