Laci was 2.4 Pds at 12 weeks she is now very close to 6 pds, she didnt gain the weight rapidly just very slowly over the first year. I wanted her to be between 5-6 pds so I got my wish. I think she will likely get to around 5 pds or so. With Laci each vet visit she would gain a few ounces then she gained a pound after her spay.