 My 2 cents of contribution ...
I once had a 2 pound puppy on surgery for a bad umbilical hernia mom had caused biting and shaking the umbilical cord.... she had her hernia repaired and got fixed at the same time.
Perfect surgery , no problems and she ended up without any scars, it was amazing !!!
My vet uses "propoffol" i may have mispelled.... and he is very experienced on small and tiny breeds !!!
He always told me that as long as they are at least 2 pounds it is safe to do the anesthesia !!
Hope that helps your decision !
Good luck !
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