Hello i just bring kobe to the vet today to have his second set of shot done, and he weight 2.8 lb

, last time we there which is just two week ago he only weight 1.8 lb.  My question is, is this normal? or am i feed him to much? he is 8 weeks old today.  he have 4 meal a day: puppy milk replacement in morning, kible for lunch, cook food for diner (i only feed him boil chicken breast or beef with some veggies, or salmon with sweet potato), and finally have his milk b4 bed, and his mom weight 6 lb and dad 5 1/2 lb