Here's a general timeline of their growth:
* Birth: Weighing about 10-14 ounces
* 2 weeks: Start to open their eyes and ears.
* 4 weeks: Start to wean off their mother's milk and start eating solid food.
* 8 weeks: Ready to go to their new homes.
* 3-6 months: Rapid growth phase.
* 6-8 months: Growth slows down but they still gain weight.
* 12-14 months: Reach their full adult size.
Keep in mind that these are just general guidelines, and individual dogs may grow at slightly different rates. It's always best to consult your veterinarian if you have any concerns about your cocker spaniel's growth.