I had two hobs snipped about 2yrs ago, and one is still firing live rounds, so yes, either the op was not a success, or the pipes re attached
I have 13 worker ferts, plus my daughter has a pet jill, lives in house, not sure on her exact age as she came in as a rescue, but must be at least 3yrs plus, she comes in and out of season no matter what time of year, I presuming because of heating and lighting in the winter months, only ever had her jabbed once, and let her go with the good snipped hob once, but she's still fine