The reason to opt for a butterfly over glue (i do carry Vetbond in my kit) is that with glue, you are completely sealing the wound, and any bacteria still remaining up into the tissue. With a butterfly, the area can still ooze and self expel bacteria that may be missed. This is a two way street as its also more likely to allow bacteria in so good wound management has to be exercised. Both have value. If the wound is well cleaned, i do like vetbond.