heres my 2nd cross bull greyhound he is 6month 3week old.he now stands at 19 1/2tts ,hes mum is 24tts and dad is 25tts..hes turning out to be a very good worker got a heart like a lion lol.. what do you think he will make....went seeing his brother the other day as my mate owns it and says it stands about 21tts.