Hi Maxx. It's hard to say how big or small they will be. Jersey like your guy is 5 months. She was 2 lbs. at 10 weeks old and only grew to 3 lbs. at 4 months old and now at 5 months she is 4 lbs. 7 oz. Her parents were 3.5 lbs. and about 4 lbs. We got Tia at about 7 or 8 months old and she weighed a little over 3 lbs. She's now over a year old and weighs in at 4 lbs. 10 oz. I think she stopped growing at around 10 months - one year. Elaine |