There are probably 2 or even 3 layers of sutures, the others are inside where you can't see.
It depends on the particular suture material used, it can take 3 weeks to 6 months to dissolve.
What you're seeing is probably where she's been chewing or licking at the sutures. I always did individual sutures on the outside for that reason; so the whole suture line doesn't come undone. But at a week post-op, she's probably fine on that.
Jean Hofve, DVM
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