1. Birth. Wolves are born blind, deaf, and toothless, weighing about 1 pound and measuring 10 inches. The mother stays with them constantly for the first few weeks, nursing and keeping them warm.
2. Early growth. During their first few months, wolves grow rapidly, gaining about 1 inch per week. They develop senses and teeth, and by 6 months can see, hear, and smell like adults with all adult teeth.
3. Adolescence. Around 1 year old, wolves develop secondary sexual characteristics and establish dominance within the pack.
4. Adulthood. Around 2 years old, wolves are fully grown and at adult weight. They continue living in the pack and help raise the next generation.
5. Old age. Wolves can live up to 13 years in the wild and up to 20 in captivity. Older wolves slow down, may lose teeth, and can develop health problems like arthritis.