Yes..I know they're only shoes, but so far she chewed like 3 pairs since march and 3 pairs or my husband's flip flops...This is really an issue...But I can't be mad for more than 15 mins...
Then she grabs her toys and everything is back to normal..
You need to help your puppy not to do this, or you will never extinguish this behavior.
Shoes are very attractive to dogs. They hold a lot of scent, both from the wearer, (usually someone the dog loves) and also on the soles and outside of the shoe that is collected as they are worn. Dogs LOVE shoes.
But they must also learn that shoes are not their toys.
Keep your shoes in your closet with the door shut. From now on, you need a NO SHOES OUT rule. Close your bedroom door, and keep the shoes put away.
If you don't have a toy box or basket for her, get one. A plain cardboard one will do, keep it in ONE place, and make SURE it's stocked with interesting things to chew....when you are going to do this SHOE exercise, make sure you have smeared several toys with a dab of peanut butter or cheese.
Each evening, take out ONE pair of shoes ( a different pair each time) and put them in your LR floor sort of near your feet in an area where you have a clear view of them. Make sure the toy box has baited toys in it. Wait for her to sniff, look at, or try to put her mouth on the shoes. When she does, correct her. Use the least correction that will interrupt her attention to the shoes. Start with "HER NAME, AH AH!" when she looks at you, get up and rush her over to the toy box in a happy exited tone, while you say, "lets go get a TOY from the TOY BOX!!!"
Make sure you are smiling, and help her over and make sure she finds a baited toy. Praise, praise, praise her for taking a toy from the toy box.
Continue to watch her, and each time she looks, sniffs, or tries to chew one of the shoes, same thing. Interrupt, and redirect to the toy box, with plenty of smiles and praise.
Combine this with confining the puppy while you are away, and keeping shoes etc put away out of her reach.
Remember, puppies are forming their permanent lifetime habits, and much of what they learn is permanent.
PREVENTION of behavior problems is a LOT easier than paying someone like me to come over and try to help you fix them later.