My Jack is an older adult and we feed him twice a day, 1/4 cup of kibble with 1/2 can of green beans with salt rinsed off. He also gets lo cal treats on occasion and we walk at least once a day and his weight stays good on that routine so just keep an eye on Charlie's weight as dachsunds are prone to overweight, which is very bad for their joints and back issues. Also get him used to having his teeth brushed! Dachsies are also prone to teeth issues.
Hoomom who was blessed with Jack. RIP Sweet Cynda 6/3/10, loving Lexie 9/13/13 and Jack, 3/22/16.