My pup came home from the vet this afternoon, and I had her a segmented noodle collar all ready, made from an extra-thick noodle and an adjustable snap-strap from Amazon. I have enough material on hand to double or triple the donut, but hoping I won't have to.
I did a bit of research before deciding on that direction and as
@BKaymuttleycrew says, the effectiveness of a donut collar really depends on the location of the wound and the flexibility of the dog. My vet apparently used a dissolving surgical glue to close the incision which, they say, tends to significantly reduce itching (as opposed to sutures or staples).
@stbob, you may have a point about the comedic value of cones, but I personally don't like them, so I was looking for an alternative. The donut/noodle collars attempt to restrict the dog's head movements and can keep some dogs from reaching some wounds.There are also recovery suits and wraps designed to cover the wound so even if the dog can reach it, he really can't damage it because it's covered up.
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@BKaymuttleycrew, that's what my research turned up, too, i.e. the donut's effectiveness depends on the location of the wound and on how flexible/bendy the dog is. My pup's not interested in licking today (she's still pretty zonked out), but I have a DIY noodle collar on her, just in case.
@stbob, laughing... I'm not sure which of those examples looks worse! The cone looks pretty awful (and is the leash attached to it?) and looks only about half as deep as it needs to be (and that poor dog looks like he's been in the wars, too), and the noodle looks a bit dubious (and what's all that other stuff on the dog? Life jacket? Harness? Saddle?) but would probably be as effective as a storebought donut collar.
Thanks for your thoughts, folks.