as　the　summer　progresses　and　the　fawns　grow，they　become　less　dependent　on　their　mother‘s　milk　and　more　dependent　on　growing　plants　as　food　sources.the　adult　males　spend　the　summer　growing　antlers　and　getting　fat.both　males　and　females　continue　to　eat　high　quality　food　in　the　fall　insgroupsto　deposit　body　fat　for　the　winter.in　the　case　of　does　and　fawns，a　great　deal　of　energy　is　expended　either　in　milk　production　or　in　growing，and　fat　is　not　accumulated　as　quickly　as　it　is　in　full　grown　males.fat　reserves　are　like　bank　accounts　to　be　drawn　on　in　the　winter　when　food　supplies　are　limited　and　sometimes　difficult　to　reach　because　of　deep　snow.　as　fall　turnssintoswinter，other　changes　take　place.fawns　lose　their　spotted　coat.hair　on　all　the　deer　becomes　darker　and　thicker.the　change　in　the　hair　coats　is　usually　complete　by　september　and　maximum　hair　depths　are　reached　by　november　or　december　when　winter　becomes　cold.