I got my biewer at 5 1/2 mos..got him on a Sunday, had it set up to have him neutered that Monday..he's huge...a whole 6 lbs if even that, and 2 1/2 years old..so, no, won't get bigger, unless you feed him more...You want to get it done before they start lifting their legs..Our vet won't do them though until between the ages of 5=6 mos. unless they would happen to start lifting their legs sooner, at which he would do it then..He just said they're such small dogs to begin with, that they tend to be able to handle the anesthesia better if you wait until 5-6 mos |