It is an Italian word having the same meaning in English and in Spanish. In English it is spelled with two l's. as allegro. In Spanish it is spelled with only one l as in alegro. To determine the meaning:
Veterinary Scales. Weigh all types of pets with more precision than most other veterinary weight scales on the market. Adam Equipment CPWplus 75L may be used for dogs that weigh up to 165 ... Weigh small and medium sized animals with this portable veterinary scale from Tree.
Small dogs reach their adult height between 10 to 12 months of age. Small breeds are dogs up to 30 pounds when fully grown. Medium breeds reach full growth between 12 to 16 months of age. Medium breeds are dogs between 30 and 80 pounds when fully grown.