@rosemarythyme has given you excellent instructions. Yes, you can use a non-stick pad over the cleaned out wound, then wrap with Vetrap securely but not tight enough to restrict blood flow. The Vetrap does a good job of keeping dirt out of the wound, so you can return the patient to the flock. I never keep a bumblefoot patient away from their mates.
Don't worry about the bandage getting dirty and muddy. The wound should stay clean. You can use a drawing salve on the wound. Pine tar is a very ancient wound treatment that still works after 2000 years. You don't need a bandage with it. You apply it and let it harden, then the chicken is good to go. No further treatment is usually needed. I've never used the method, though, but some here on BYC use it.
Don't worry about the bandage getting dirty and muddy. The wound should stay clean. You can use a drawing salve on the wound. Pine tar is a very ancient wound treatment that still works after 2000 years. You don't need a bandage with it. You apply it and let it harden, then the chicken is good to go. No further treatment is usually needed. I've never used the method, though, but some here on BYC use it.