I really don't know if Weetabix is supposed to be good for dogs, but when my Jock (German Shepherd) was a puppy, he used to have 2 Weetabix moisten with puppy formula milk, which is obtainable from all good vets. He had this for breakfast until he was 9 months old, and after that he had 2 Weetabix moistened with a little warm water. It just breaks the night-fast, as it's a long time until the main meal at 6pm. Jock grew into a strong and handsome dog, who never had a days illness in his life until he was 14yrs old, when he had to have a large benign cyst removed from the centre of his back. The vet said that normally it wouldn't be advisable to put a dog of his age under general anaesthetic, but decided following tests that he was so healthy and his heart was very strong that they considered it would be safe to do the operation. The operation was a success, and Jock lived to be 16 and a half years of age. Sadly old age overtook him and he was put to sleep 14 years ago, and is still sadly missed. As the expected lifetime for German Shepherds is anywhere between 9 and 12 years, Jock certainly had a long and healthy life, I don't know how much of it was down to a good start in life on Weetabix and the formula milk (formula milk helps to build strong bones while the dog is in the early growth stage). I thought you might like to know of my experience, but you could ask your vet for advice. Best Wishes. Schutz.