We took Maddie to be spayed 3 weeks ago. A week after her surgery, it appeared she was developing an infection. Took her back to the vet, he put her on antibiotics. Signs for infection cleared up. Last monday, the vet removed her stitches, all looked well. Friday night she had what appeared to be a large blood blister develop on the incision site. Called the vet, he said put her back on antibiotics. By saturday morning, blood blister poped, and incision site began to open up. The vet said she may be allergic to the inside stitches. Today she is having surgery again. He is opening her back up, and removing inside stitches. What a night mare. Has anyone else experience this?