Hi i have a 5mnth old pup and wondered what the average age was that the pup stops growing up!! (If you get me??) when do they stop growing tall and start to form what sort of age?

Verymuch depends on the breed and even then different lines within a breed finsihs growing at different ages.

My dallies dont usually finish until around 14months as mine are late maturers.  I hope my beagle is the same otherwise I have got a dwarf version :)