I had issues with that company as well. Waiting half a year and filed a complaint and refund with PayPal. Got the shoes elsewhere later.
As for the shoes, I use them for multiple healing stages. For example, if one duck is starting to have a small sign of infection but not really an infection yet, I would put a special ointment on then the booties to cushion and protect the feet. Whenever I use the boots, I block their access to the pond.
I also use it for whenever I have to remove a scan or bumble foot, or the bet does it for me. I change the bandage around the foot twice a day and then put the booties on top, to keep it dry as long as possible.
As mentioned earlier, I have to make sure to wrap around the top velcro because they are pros at removing them.
The booties are amazing.