Question – I’ve adopted a Greyhound X puppy from a rescue organization. Right now, he is 5.5 months old and he’s already become quite a large dog! How much longer will he keep growing and how big will he get?
Answer: It’s a bit difficult with mixed breeds to guess the age at which they will finish growing and just how big they will get. If you know the breed of one, or even better, both of the parents than you can consult a reputable breed guide to get a good idea of the size and weight for those breeds.. Aside from that, it may be useful to know that most small breed dogs are fully grown between 6 to 9 months of age. Large breeds won’t be fully grown until 18 to 20 months of age – so you may be waiting awhile!