My pebbles was 2 pounds and she was kept overnight. She did have a bad resp tract infection from tube they used and had to have 3 weeks of antibiotics. Still think they may have damaged her trachea. Also pulled out about 8 baby teeth but couldn't get them all because vet said she " got in trouble" and had to be taken from under anesthesia quickly. Most don't have complications but mine did. My boy bam bam on the other had was about 4 pounds and he had no trouble at all with his neuter but neutering is a lot less invasive of course. Wish u the best |