High levels of the hormone contribute to the following:
1) Development of the mammary gland for expectant wolf mothers
2) Maintenance of lactation – helps milk production in wolf mothers
3) Promotion of parental behavior in both males and females and thus enhances pup survival
4) Shedding of the undercoat!
So longer days alter the chemical makeup of wolves and help ensure that they spend the spring and summer months in comfort with their happy healthy packs.