Their quickest growth period happens between 0 - 25 weeks. Good with other Dogs: Good With Other Dogs. Breeds within this category will gain 2 - 5lbs per week. Giant breeds take longer to reach their adult weight, usually between 12 - 18 months however, this can be as long as 2 or 3 years. These are the majestic and lovable breeds that weigh over 100lbs. Last but certainly not least are the giant breeds of dogs. Their fastest growth period occurs between 0 - 20 weeks. (You will be given the option to add another animal when finished.) Animal Type Dog Cat Guinea Pig Bird Monkey Rabbit Pig Horse Ferret Chicken Hamster Goat Turtle. Large breed dogs weigh between 50 - 100lbs as adults. If you have any questions or prefer to place an order over the phone call (985) 570-5386. They were so low the breed almost went extinct. It was a very popular hunting dog through World War 1, but lost the popularity game to the Labrador and Golden Retriever. The Portuguese Podengo Pequeno is a small purebred known for being affectionate, lively, loyal, and protective. Large breed dogs grow slower than the smaller breeds and take 12 - 18 months to reach their adult weight. The Flat-Coated Retriever Portuguese Podengo Pequeno Mix, is a mixed breed dog resulting from breeding the Flat-Coated Retriever and the Portuguese Podengo Pequeno. Medium breed dogs do most of their growing between 0 - 16 weeks. Puppies that are considered a medium-sized breed, usually reach adult weight between nine and ten months old.ĭogs that are considered to be medium-sized are between 25 - 50 lbs at adult weight.