You will need:
A set of digital kitchen scales- for accurate meal portioning
A measuring tape- for monthly measure-ups (chest, neck and abdomen circumference)
Access to bathroom scales or pet scales. (For dogs heavier than 16 kgs or 35 lb. we recommend using walk-on dog scales located in your nearest vet clinic or pet retail outlet. Use is generally free of charge.)
Alternatively you may consider buying an in-home pet scale such as the W.C Redmon Precision Large Digital Pet Scale.