If it's internally stitch, it shouldn't happen.
When my bridge bun Goofball had her surgery, there was the stitched wound. Although it's internally stitched, I put a big patch of non-sterile pad on it. They are about 4 in. x 3 in.
I then put non-stick "green" painter tape around the pad, wrap around her fur on all for corners (cross diagonal). They are non stick, as long as you remove them once a day, it doesn't stick to her skin, not to mention I warp it around her fur.
The method works perfectly. The pad is so large, she can't dig thru the pad and touch the wound. And if 1 pad is not large enough, get a 2nd one. A big box of 100 is only like $15.
Now, supposedly, they said the wound needs to breathe, but it will still sealed w/ the pad and prevent you a case of infection.